I finally got the DC sports header!! Ahhh! I can't wait any more either, so I thought i'd post letting everyone know i'm putting it in TOMORROW night. I will definetly have pictures posted this weekend. Stay tuned!

[

sweet!

Let us know how it feels with your butt dyno.

I got mine today also and I was gonna do the same thing, but its gonna rain around here for the next couple of days so I won't get a chance this weekend. Let me know how the install was and if there are any problem bolts (and if the Torx E7 is needed :) ) . Also is yours a 4-2-1 or a 4-1?

Mine is 4-1 although DC says 4-2-1 on their website.
http://img58.exs.cx/img58/7894/pict07142dq.jpg
http://img58.exs.cx/img58/1830/pict07157nm.jpg

Isn't it beautiful? Mine is a 4-1 as well...don't know why it's listed as a 4-2-1. I noticed you have the K&N CAI and the TRD exhaust..how does it feel? Notice a difference? I'm getting the K&N and thinking about getting the TRD exhaust but i'm still thinking on it. I might get the DC Sports exhaust but i'm not into anything too loud. How does the K&N intake effect the sound of the exhaust?

More tomorrow..

You will definitely notice a difference with the K & N. When you hit the gas, you'll feel the car accelerateing faster than the with the stock setup. It made the TRD sound louder and after the headers are installed, the I/H/E combo on the tC will sound pretty sweet. Alhough the DC Sports Single Canister Exhaust claims to be a catback, if you look at pics of it mounted on a tC, it looks like it's connected to the stock piping by the axle, so it might be just another axleback. The TRD is great for sound, but I dunno if theres any power gains. Also checkout the Ingen exhaust.

Where are you finding pics of the cat-back???

When you get this header installed I must know what it sounds like. I want to get the header for my moms car but I dont want it to be any louder.

So were going to have all the same mods as you. hahah. K&N, DC header, TRD exhaust. :lol:

I've been jumping back and forth between the Injen, DC, & TRD for the past couple of weeks. I can't seem to make a decision! :) I know I shouldn't rely soley on videos, but the sound that the Injen gives on them isn't what i'm looking for. So until then....i'll keep deciding. Most likely the TRD though..

And..Techinically, the catalytic converter is one piece from the header all the way to the axle. So I guess what DC Sports claims on their new exhaust is somewhat true. The only way to change the piping is to cut the pipe RIGHT after the converter. The converter is actually a one piece system from under the engine to the axle. So that would make the TRD exhaust a cat back as well.

Where are you finding pics of the cat-back???


If you look closely at the pics, you'll notice the exhaust is connected to stock black piping of the car.
http://www.scionlife.com/forums/viewtopic.php?t=31563&postdays=0&postorder=asc&start=25

And..Techinically, the catalytic converter is one piece from the header all the way to the axle. So I guess what DC Sports claims on their new exhaust is somewhat true. The only way to change the piping is to cut the pipe RIGHT after the converter. The converter is actually a one piece system from under the engine to the axle. So that would make the TRD exhaust a cat back as well.

Looks like you have point (from the tC service manual)
http://img92.exs.cx/img92/4329/untitled9zf.jpg

The real cat in mounted on the stock exhaust mani. The 2nd cat doesnt do anything besides cause back-pressure as they all do.

As for the DC cat-back. What if that black pipe is included with the system. Its just black because its not seen so it doesnt have to be pretty???

Im sure its a cat-back.

When installed my TRD exhaust, I had to connect it to that same black pipe. I've seem the DC cat-back system on other cars come with all new silver piping. If it comes with that black pipe, then I guess thats something different.

i think that you should go with the TRD exhaust...it gives a real nice throaty sound...def TRD....a bunch of people have asked me about the exhaust and says it sounds real nice...theres my 2cents :D

So now I guess it's between the DC Sport and the TRD...until then.

So I thought this was a header post? ;) Definetly this weekend I will have pix up!!! Promise.

its all about the injen exhaust :) ive got some sound clips on my car domain page hehe i really like it alot. oh yeah about those headers... lol

12/10/04
2:44pm CT
Update: I'm at the shop right now but no card reader so I can't upload the pix as of yet. You do need to Torx E7 to remove a stud to take the heat shield off. You could probably use pliers or vice grips as well. Back in an hour or so...MOO HA HA!

12/10/04
4:35pm CT
Update: Installation completed! No problem installing except we had to move the oil stick to get it in. Fits nice, no leaks, no problems w/ tools.

As for the difference...you can feel a nicer pull, especially @ 4k rpms. nycazn, if you haven't installed it yet...I think it will be awesome with your intake and exhaust. Can't wait to get mine! I think i'm sticking with K&N for now...I won't be needing the intake for long anyhow...due to future mods that is ;). As for sound..with my stock exhaust, it's nothing cool or spectacular, but you CAN hear a difference. A little more grr to it...

I'm satisfied =)

FYI: I called the dealer to see how much installation would be for those of you guys who are considering switching out your exhaust manifold, and they told me it would be about $196.

Total I spent for this mod including part & installation...$264. Good deal, huh? It'll all add up with everything else I want to do...

Pictures posted VERY SOON.

nycazn, if you haven't installed it yet...I think it will be awesome with your intake and exhaust.

Thanks for the update....can't wait to see the pics

Wow, where the hell did you find it at a price so cheap?

I paid the same thing from www.mcgeorgeparts.com. $299-$50 Scion Gift card = $249 + $15 S/H

BTW...good luck finding that torx E7 piece. I checked home deopt, strauss auto, & sears and no one had it by itself or even a set with that piece in it.

Nice avatar tChick!

As promised, pictures of the installation of my DC Sports Header....

WAIT TO LOAD!

Gorgeous. From Mcgeorgeparts.com..shipped in 3 days. Good price, right nyazn?
http://img.photobucket.com/albums/v260/tlblancaflor/dc1.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/dc2.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/dc3.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/dc4.jpg

Before=ugly
http://img.photobucket.com/albums/v260/tlblancaflor/stock1.jpg

Using torx tool to remove heat shield...a cinch.
http://img.photobucket.com/albums/v260/tlblancaflor/usingtorx.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/torx.jpg

OFF!
http://img.photobucket.com/albums/v260/tlblancaflor/stock2.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/off.jpg

Stock off.
http://img.photobucket.com/albums/v260/tlblancaflor/stock4off.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/stock3.jpg

Stuff you no longer need...
http://img.photobucket.com/albums/v260/tlblancaflor/noneed.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/bay.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/dc5.jpg

Taking off any excess ceramic to avoid leaks
http://img.photobucket.com/albums/v260/tlblancaflor/clean.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/done2.jpg

http://img.photobucket.com/albums/v260/tlblancaflor/on1.jpg

COMPLETE!
http://img.photobucket.com/albums/v260/tlblancaflor/done1.jpg


So? What do you think? It was pretty fast and I would recommend the headers...it also improved the throttle response pretty well...I have more pix if you guys want...

Thanks for the compliment on my pic...

You're welcome.

Why did the mounting part flange of the header get scuffed?

Wheres the scuff?

And yup, same price as nycazn...
$299-$50 Scion Gift card = $249 + $15 S/H

Do you need to put the heat shield back on with the DC header? Or are you keeping it how it looks in the last pic?

Wheres the scuff?

http://img.photobucket.com/albums/v260/tlblancaflor/clean.jpg

It wasn't scuffed. The ceramic coating was running (like paint run) so he was sanding the paint flush to avoid any leaks. It worked well...no probs. Great product nonetheless!

You can't put the shield on because it only mounts to the stock exhaust manifold. It's ugly anyway..

When installed my TRD exhaust, I had to connect it to that same black pipe.

Well ours isnt black. Its more of a stainless color. I was under the car today since it was getting the oil changed.

tChick, glade to hear the install was nice and clean. Man ohh man does it look sexy!!!! So there isnt much difference in exhaust tone???

Im getting this header soon. Creative Compacts has it for $299, free shipping for holiday. :D

I was wondering why the installer wasn't wearing any latex gloves during the install? I was under the impression that without gloves on during the install, you'd have nice little finger prints, where ever you touched the header. Somthing to do with the oil residue on your fingers, and the heat from the header???

I could be way off...just somthing I kinda re-call back in the day when I was first into the import scene.

Btw: Great Pics!

I think those are stainless headers only. I think it looks great after the oils have burnt onto the header.

I have a stock exhaust and I still can hear a difference in the tone. Nothing louder, but much deeper than it was. I haven't heard it from the outside but I can hear it well from the inside. I'm sure it'll make any exhaust sound better, if not a lot different....

He didn't really need latex gloves since it wasn't that messy of a job. But I can see where you are coming from. The only gloves he used were to take off the heat shield when he first started.

I think i'm liking the headers more and more with time. ;)

So were going to have all the same mods as you. hahah. K&N, DC header, TRD exhaust. :lol:

I guess so! ;) I just orderd a K&N intake. I know I should be more patient and wait for the AEM but I had already tried that. I hate hearing that's available on a website but it's really not or that it's coming in a week and it's not and back and forth..blah blah blah. I have no problem with K&N and i'm planning on getting an SC for sure (like everyone else) if not turbo...so it will only be temporary. I just like having fun for now :D

And as for TRD, I might as well get that one because i'm sure that it'll sound just right with the headers & intake together. I really don't want to drive around with a car that shouts "Hey race me!" or "Hey look! She's driving her boyfriends car! Aww, why would her boyfriend let her do that?!"....nm off topic! :lol:

Hey tChick...don't get the TRD exhaust yet. i just installed the headers today and took it for a spin arround the block. The sound might have been over a 100db and sounded kinda "ricey". Maybe it hasn't broken in yet or the exhaust might not be use to extra amount of fumes comming out.

I'm gonna drive it arround and do some x-mas shopping.......I'll try to post a sound clip tonight when I get back. Hopefully it will sound better or I might get rid of the headers and/or get a different exhaust.


Well ours isnt black. Its more of a stainless color. I was under the car today since it was getting the oil changed.


You are absoulety right about the pipe. I did my install back in July and I guess I had a memory laspe. The funny thing is DC's exhaust system is suppose to be all stainless steel with the piping. I guess we'll have to wait and see what comes out.

Hey tChick...don't get the TRD exhaust yet. i just installed the headers today and took it for a spin arround the block. The sound might have been over a 100db and sounded kinda "ricey". Maybe it hasn't broken in yet or the exhaust might not be use to extra amount of fumes comming out.


Damn, thats what I didnt want. PLEASE get a sound clip. I mean, believe it or not I think the TRD is pretty loud. Nothing compaired to me Mx6 but its loud.

I bet it gets buzzy in the 3500-4000rpm range right??? With just the TRD exhaust I think it sounds good in those rpms but it is rather raspish.

Hows the power difference though with your combo mods???

About the exhaust. Believe it or not from the S-bend back its a pretty clean flowing stock exhaust system. Of course better flow could be made by taking out the resonator and 2nd cat. The S-bend is one nasty pipe, I wonder if Weapon-R will have just the S-bend for sale???
Swapping out that bend IMO could be an easy 1-3hp.

I bet it gets buzzy in the 3500-4000rpm range right??? With just the TRD exhaust I think it sounds good in those rpms but it is rather raspish.

Hows the power difference though with your combo mods???


If you thought the TRD was raspish at 3K-4K......HOLLY **** is this loud (in a bad raspish way IMHO). Honestly I only drove it for 5 mins after the install, so maybe I'm too quick to judge.

I had the TRD exhaust since the first week I had the tC so I can't comment if it added any power. The CAI is a must get. You'll feel it right off the bat. I'll post tonight and describe how it is with the headers.

I was wondering why the installer wasn't wearing any latex gloves during the install? I was under the impression that without gloves on during the install, you'd have nice little finger prints, where ever you touched the header. Somthing to do with the oil residue on your fingers, and the heat from the header???

I could be way off...just somthing I kinda re-call back in the day when I was first into the import scene.

haha, here's a stupid story. when i installed my header....i wrote "matt was here" with my fingerprints :P haven't looked to see if it really comes out though. i'm an idiot. woohoo.

Oh Oh...too loud, eh? I guess some people are into that kinda thing, but it looks like none of us are. I always thought that the TRD might be the quietest of all my choices but with the headers, I might have a dilemma. It doesn't mean i'll take 'em off though! ;) I definetly don't want a loud exhaust, do DC Sports is probably out of the question....?

BTW, how was your install? But yeah, let us know how it is after it breaks in a little.

is the dc sports a twin canister? cause those are supposed to be pretty quiet. or you could go to a custom place, and just have them put in a resonator.

I had the TRD exhaust since the first week I had the tC so I can't comment if it added any power.

I ment hows the powe difference with the header, intake and TRD exhaust. Did the header make a big difference when its paired with the intake???

If you thought the TRD was raspish at 3K-4K......HOLLY **** is this loud (in a bad raspish way IMHO). Honestly I only drove it for 5 mins after the install, so maybe I'm too quick to judge.


So its really that loud??? Is it loud on the inside of the car??? With windows up and everything......
Damn!!!!! I wanted to install the header and not have my mom know. :D
Please get a vid. If you could rev the ____ out of the car. Most people do low rpm revs and that doesnt do anything. I want to hear the header/TRD as the car is under load.

I know the TRD exhaust doesnt do anything, its an axle-back. It may save weight....
Our car was ordered with the TRD, I dont even know what the stock exhaust sounds like. haha

is the dc sports a twin canister? cause those are supposed to be pretty quiet. or you could go to a custom place, and just have them put in a resonator.

The DC has a resonator and a after the axle muffler. Its pretty much like the stock exhaust system. Just less restrictive and bigger pipes too. Im sure the DC has a nice tone. DC seems to be pretty quiet. Although most cars with DC and paired with a header they do get som rasp.

Hehe, me again.

Did the CEL come on?? Somone on ClubScion got the CEL after the header was installed. Also did you reset your ECU after the header install???

Nope, my light didn't go on..

do you need to keep your old header/cat to pass emissions? damn proximity to NYC means emissions testing every 2 years, although I might be tempted to reregister the car with a friend in upstate NY to avoid that... :twisted:

Does anyone know if there are 2 oxygen sensors on the tC? I see only the one before the cat. Is there one located in the rear of the catalytic converter (in the exhaust pipe)?

Did you weight the DC hearder before you install it? I wonder how much weight differet between stock and DC.

For those of you that swapped out the exhaust. Did you find out the weight different?

I am looking into make the my tC lighter...
:wink: :wink:
Thanks

Did you weight the DC hearder before you install it? I wonder how much weight differet between stock and DC.

For those of you that swapped out the exhaust. Did you find out the weight different?

I am looking into make the my tC lighter...
:wink: :wink:
Thanks

Shipping weight for it was 15lbs

Does anyone know if there are 2 oxygen sensors on the tC? I see only the one before the cat. Is there one located in the rear of the catalytic converter (in the exhaust pipe)?

Yes, for obd2 cars there is always one before the conveter and one after the converter.

do you need to keep your old header/cat to pass emissions? damn proximity to NYC means emissions testing every 2 years, although I might be tempted to reregister the car with a friend in upstate NY to avoid that... :twisted:

If the emissions there is based on your computer on your car, you will most likely pass with the DC sports header. My CEL did not go on which means my other catalytic converter is still doing it's job.

Did you have to put on a new header gasket?

P.S. Smoking avatar

Did you have to put on a new header gasket?

P.S. Smoking avatar

No, it's stainless steel.

Thanks!

where did you get your headers from?

Yes, for obd2 cars there is always one before the conveter and one after the converter.

Really??? Wheres the 2nd one. I looked buy I didnt look that hard.

where did you get your headers from?

Right after the 2nd cat.

I bought the headers from mcgeorgeparts.com...I believe they sell it for $314 with shipping.

i called and he said they are not out yet, he said try in 2 or 3 moths?

www.creativecompacts.com has them now for $299 shipped :)

i called and he said they are not out yet, he said try in 2 or 3 moths?

Who did you call? Was it www.mcgeorgeparts.com? If you did, make sure you talk to Paul, he knows whats going on.

thanks alot, ill call him tomorrow, i want to get the same setup you have, i saw that video and it sounds good.

Did you have to put on a new header gasket?

P.S. Smoking avatar

No, it's stainless steel.

Thanks!

I thought they were ceramic...

Did you have to put on a new header gasket?

P.S. Smoking avatar

No, it's stainless steel.

Thanks!

I thought they were ceramic...

I'm talking about the exhaust gasket....not the actual headers. ;)

which place would you perfer or is has better service?

www.mcgeorgeparts.com or www.creativecompacts.com

I never had a problem with mcgeorge....ordered on monday...received thursday. never ordered through creativecompacts.com though...

hey tchick, nice header, hows the car pull with that on? are there any hp numbers out there?

hey tchick, nice header, hows the car pull with that on? are there any hp numbers out there?

hi mahal...

it pulls a lot better that stock...but no #'s on me. :?

sounds good tchick
i might be following your setup except for the exhaust, immah customize my own
is the header the only engine mod you got so far?

theres something sexy about a girl modding her own car. and even sexier when its something engine related :o

do you need to keep your old header/cat to pass emissions? damn proximity to NYC means emissions testing every 2 years, although I might be tempted to reregister the car with a friend in upstate NY to avoid that... :twisted:

If the emissions there is based on your computer on your car, you will most likely pass with the DC sports header. My CEL did not go on which means my other catalytic converter is still doing it's job.

nope, they do exhaust testing on a dyno (or similar). every car has a range, and you have to fall within that range to get an inspected sticker. so you can't even hook another car up to the machine as it would fail if it registers too low emissions... :x

Why didn't this thread start 2 days earlier. I was leaving for a mini-vacation last Wednesday and ordered both TRD muffler and a DC header. Now TRD muffler will probably have to go. We'll see in a week or so.

Thanks for the pics and the Torx E7 trick - I was wondering how do they recommend getting around this part - so now I have an E7 socket on order, too :)

Anyway, can't wait for the inside/outside sound clips of TRD/DC combo.

So, it replaces the cat... meaning, it will be difficult to get it through inspection.

So, it replaces the cat... meaning, it will be difficult to get it through inspection.
The difficulty of passing the inspection = the difficulty of putting the stock header back on. So for some it will be a pain, for others - not.

So, it replaces the cat... meaning, it will be difficult to get it through inspection.
The difficulty of passing the inspection = the difficulty of putting the stock header back on. So for some it will be a pain, for others - not.

Exactly! It should only take no more than an hour for the whole project. Just don't put the OEM heatsheild back on for the day you get the inspection. After it's all done, it's only a few bolts away from going back.

Can't wait till I move to FL, it'll be fine down there. :)

sounds good tchick
i might be following your setup except for the exhaust, immah customize my own
is the header the only engine mod you got so far?

hii...

yup, the only engine mod so far....i'm getting an intake shipped soon but i don't think i'll be needing it for long....i plan on getting the sc in this coming spring so i think i'll have it sold by then...the intake is just temporary fun fow now. ;)

AND OH OH...HEADERS UPDATE..

my CEL went on! but you know what? the way the headers are designed was that the o2 sensor only reads one piston..which is odd but i'm going to ck it out later on tonight. it might be something else! if it's the converter, i may have to redo the piping with a better converter , relocate the o2 sensor, or worse yet....put in my stock exhaust manifold! eeek...we'll see. i don't think it's that bad at all because the light went off a day or more later. if it was bad, it would have turned on from the start...

keep us posted on what is happening with your tC cuz I was thinking DC header but not sure if it will keep tripping my CEL.

The CEL is logical - I'd be very surprised if you didn't get a CEL... I can make a pretty good guess what the code it is for - "catalytic converter efficiency below threshold" - or something in that area. Relocating the O2 sensor behind the second cat might help, as will getting a O2 sensor emulator. I'd also try plugging the second O2 sensor port and just leaving the sensor hanging in the air.

i want to buy the hearders but can someone tell me if it is easy to install them and uninstall them for when i go for emmissions test

I had the same problem on the first day. The CEL was on the first day (when I made the video). Today before work, I reset the ECU and the light went away. The car ran better today and the sound isn't as bad. I'll keep everyone updated if it comes back.

I had the same problem on the first day. The CEL was on the first day (when I made the video). Today before work, I reset the ECU and the light went away. The car ran better today and the sound isn't as bad. I'll keep everyone updated if it comes back.

tommy good to hear it worked out ok...i'll reset mine too and see what i get...it's weird that it only happened the next day or so with mine though...i guess it still had to kick in...AND it was after i filled my tank with gas...

sounds good tchick
i might be following your setup except for the exhaust, immah customize my own
is the header the only engine mod you got so far?
hii...
yup, the only engine mod so far....i'm getting an intake shipped soon but i don't think i'll be needing it for long....i plan on getting the sc in this coming spring so i think i'll have it sold by then...the intake is just temporary fun fow now. ;)

hahaha sounds like your a cool ___ chick keep me posted on your car! i dont think im getting the header anymore might just wait for another one that uses a cat. i guess my money is gonna go towards the teins ss coilovers because i got hook ups on those and after that maybe new shoes or TURBO!! :twisted:

I had the same problem on the first day. The CEL was on the first day (when I made the video). Today before work, I reset the ECU and the light went away. The car ran better today and the sound isn't as bad. I'll keep everyone updated if it comes back.

tommy good to hear it worked out ok...i'll reset mine too and see what i get...it's weird that it only happened the next day or so with mine though...i guess it still had to kick in...AND it was after i filled my tank with gas...

tanya...double check the gas cap is screwed in tightly. i've read somewhere that if its not on tightly, it can result in a CEL due to fumes escaping. Thats wierd your light came on a day afterwards. When mine came on the first day, I thought i damaged the sensor during the install, but after the reset, I'm just keeping my fingers crossed that it doesnt come on again.

does mcgeorgeparts.com accept scion gift cards?

how do you reset your CEL? do you have to use an OBDII tool?

There's one way by removing a certain fuse:
http://www.scionlife.com/forums/viewtopic.php?t=33062

but I just disconnected my battery for 30 minutes and that worked (time could be shorter I think)

I had the same problem on the first day. The CEL was on the first day (when I made the video). Today before work, I reset the ECU and the light went away. The car ran better today and the sound isn't as bad. I'll keep everyone updated if it comes back.

tommy good to hear it worked out ok...i'll reset mine too and see what i get...it's weird that it only happened the next day or so with mine though...i guess it still had to kick in...AND it was after i filled my tank with gas...

tanya...double check the gas cap is screwed in tightly. i've read somewhere that if its not on tightly, it can result in a CEL due to fumes escaping. Thats wierd your light came on a day afterwards. When mine came on the first day, I thought i damaged the sensor during the install, but after the reset, I'm just keeping my fingers crossed that it doesnt come on again.

i did that first actually...but i guess if the light goes on for that, it will stay on until i reset/ck it...;/..i doubt the prob is bad though...

does mcgeorgeparts.com accept scion gift cards?

YES (thank goodness)....fax copy of card..email to notify them and call if you'd like to make sure they've got it...

I called DC Sports tonight, asked them about a CEL - they said that since it's a race header, they will not do anything about CEL, and having a CEL is normal. I would not be happy with this kind of attitude, but still, here's one of the ways out for the DC header CEL victims:

http://www.o2sim.com

Looks like they are selling a universal 02 sensor simulator that will help you get rid of emissions-related error codes and consequently your CEL. It does require a little bit of knowledge of what you are doing, so keep that in mind. If somebody will be doing it and will need wire color codes for the second 02 sensor - PM me, I'll look it up in the service manual.

Same thing happened when I installed my headers as well. No light at first but I kept driving and the light came on. I'm almost sure its from there not being a Cat Conv present. Thanks for the link to that universal O2 sim.

Peace

Update: As we all predicted, the CEL code for the DC sports header ended up being for the low cat converter efficiency. Since this header takes out the 1st one, the 2nd one isn't good enough. I'll most likely remove the cat and weld on a bigger, better one when I get my exhaust system. I'm not sure though....
Just an FYI for those of you who are looking into the DC Sports Header....

^^^ It's not because the second cat is not good enought - it's because the second O2 sensor is in front of it, not behind...

Well hmm....good point. The OBD2 scanner was ust telling me that the cat that I had in there wasn't efficient enough. I would think that the 2nd cat is still could enough..but i'm sure about emissions? That's why I would think that replacing the 2nd cat JUST for emissions might be logical..??

can you reroute the second sensor under the car so its behind the second cat? might fool it enough to think that there's the original cat on it... :?:

To get rid of the CEL all you might need to do is move the second O2 behind the second cat (I would just add another bung there and plug up the original bung before emissions time). Then when emissions time comes - put the stock header back and move the sensor in its original position. As for trying to pass emissions with just moved O2 sensor - you will pass it if you find an emissions station that just plugs an OBDII reader in the port, looks for codes and lets you go (look for one that says 1996 and newer vehicles). As for the sniffer emissions testing - can't say. You might pass or might not. Depends on your laws and requirements that they have for our cars.

We are working on a cat for the header system that will solve the CEL problems. Anyone with the DC header running into any problems while driving the car?

nope =)

To get rid of the CEL all you might need to do is move the second O2 behind the second cat (I would just add another bung there and plug up the original bung before emissions time). Then when emissions time comes - put the stock header back and move the sensor in its original position. As for trying to pass emissions with just moved O2 sensor - you will pass it if you find an emissions station that just plugs an OBDII reader in the port, looks for codes and lets you go (look for one that says 1996 and newer vehicles). As for the sniffer emissions testing - can't say. You might pass or might not. Depends on your laws and requirements that they have for our cars.

Give us another two weeks, we will need a test car with DC headers however to ship a sample part to for testing. Anyone up for it?

We are working on a cat for the header system that will solve the CEL problems. Anyone with the DC header running into any problems while driving the car?

My only problem is the CEL light is on and it's blinding me when I drive at night...j/k. My car runs perfectly fine. (even better since I put my stock exhaust on instead of the TRD)

We are working on a cat for the header system that will solve the CEL problems. Anyone with the DC header running into any problems while driving the car?

My only problem is the CEL light is on and it's blinding me when I drive at night...j/k. My car runs perfectly fine. (even better since I put my stock exhaust on instead of the TRD)

WOW, really! How so?

We are working on a cat for the header system that will solve the CEL problems. Anyone with the DC header running into any problems while driving the car?

My only problem is the CEL light is on and it's blinding me when I drive at night...j/k. My car runs perfectly fine. (even better since I put my stock exhaust on instead of the TRD)

Not as loud? :-P

someone help me out...How does a header improve "power"? I really dont see the point. I mean isn't the header just carrying the exhaust fumes out of the engine...

We had no CEL issues with our header with everything running and connected correctly. The only CEL we ever got was when the 1st O2 sensor snapped off on us. Swapped in a new sensor and no problems. The main difference I see is that all the other headers out there right now are NOT full length, meaning they still retain the stock B-pipe where the second O2 is mounted. This bottleneck increases the concentration of gasses for the sensor to read. If the upper sensor is flowing quick and clean, but the lower sensor is running slow and dirty, the ECU is definitely not going to like that.

someone help me out...How does a header improve "power"? I really dont see the point. I mean isn't the header just carrying the exhaust fumes out of the engine...

take a run around the block breathing only through a straw and tell me why a good exhaust system is needed as well as an intake... heh a friend of mine told a guy that once...
A good header system will also smooth exhaust flow and orchestrate exhaust flow pulses so that it maximizes an effect called scavenging that uses suction to help empty the cylinder as well as pull fresh air/fuel into it.
The problem with the DC system is pretty obvious.
1. Primary O2 sensor only reads off 1 cylinder(visual inspection at an emissions station you would fail, although unlikey as its obdII and here in AZ you dont need to get smogged for 4years after buying a new car)
2. You need another cat to not have to "trick" the O2 sensor...

Ideally DC header($300)+ random tech cat($150)+ repositioning O2 sensors(welding and wiring $50)+custom pipe(with resonator to quiet it down) and muff($300)= No problems with a great perf custom exhaust...
Turbo- swap header for downpipe and you'd have to do the same thing

Peace

Does a cel mess w/ engine performance, like running in safe mode? I also heard when you have a cel the vvti might not work right, my friend said it happened in his civic and the vtec would not work same think. So who has the answers!!!

my first o2 broke. when the CEL goes on the car does go into safe mode, car runs like CRAP. got it replaced everything is all good

100th POST!!

lol wat the hell did you people think would happen when you removed the primary cat?

Does a cel mess w/ engine performance, like running in safe mode? I also heard when you have a cel the vvti might not work right, my friend said it happened in his civic and the vtec would not work same think. So who has the answers!!!

I know Hondas have 2 levels of CEL lights if you will...
1 The car runs the same revs up to redline etc.
2 The other limits the car to 4000 rpm.
Depending on what code and what level of protection the programmer wanted to input for that CEL...

Peace