I've read and read and read posts on here about each of these. The price difference between the Megan and ZPI is $100. For performance gains and quality which one really is the way to go? Any input from you guys who have these parts would be appreciated. I plan on getting headers, now I'm not sure if I should go with the DC or Megan headers. I currently have the TRD exhuast now if that helps. I don't mind spending the extra $100 if the build quality is superior.

 

You really can't beat the Megan header and s-pipe for the money. The quality and fitment is really good and they give excellent horsepower gains.

-Jeremy

 

if i ever get my s-pipe from zpi, i'll let you konw what i think of it.

 

well if you have trd, get megan, you don't wanna have a bottleneck setup w/ all the different pipe sizes....i have megan s-pipe and its great....and i heard that zpi spipe hangs a little lower so watch out

 

so stock headers, zpi s-pipe, zpi mid-pipe, and trd exhaust are all different sized pipes?

 

You are really funny. You should be comedian... or a lawyer...

 

from what i been reading, zpi is 2.5" and megan is 2 1/4" and problem is you can only get that zpi from zpiracing.net and its kinda pricy for a spipe and $300 for a mid?!?!?!
trd exhaust so be the same size as the megan piping because on some online sites when you buy the megan mid it says "fits directy to OEM and axle back exhausts such as TRD"

 

invidia S-pipe FTW!

 

i got the whole zpi spipe all the way back. pipes are a huge 2.5 all the way. whatever you decide on getting keep in mind what Sleep3r said about fitment. no point in getting anything 2.5 if you are just going to end with something thats 2.25.

 

So I decided to go with the Megan S pipe and mid pipe. Now obviously I'm gonna get headers to finish this off however I noticed the Megan headers are without the cat. I just got the car and don't have to get it inspected until March of 2011. I mean I could always put the stock parts back on but that's a pain. I read the reviews of the DC header and people seem to like it alot. Is it wise to get Megan pipes then a DC header? Or does it not matter? Sorry for all the questions I'm new to all this stuff.

 

I have been a mechanic building race cars and hot rods for about 15 years. I have an 06 tC that I have just recently installed a megan racing header. It is not difficult even for the average "backyard" mechanic to install... however just be warned about this. megan racing headers are excellent quality. I have NO complaints about mine. but it WILL trip your Check Engine Light. there is a fix for this. you need a set of 18mm "Help" brand sparkplug antifouls. you can get them from your local checker or autozone for about 3 or 4 bucks. you will need to drill a 1/2" hole in one of them to accomodate the O2 sensor on the down pipe (s-pipe) NOT the one on the header!. this will fix that problem. the other thing is... is that you WILL have to modify the OEM lower mounting brackets as the Megan header does not line up exactly with the aftermarket Megan racing header. this is true for almost any aftermarket performance parts. you have to count on at least slight mods to OEM parts to make it fit. but it is fairly easy to do with a rasp or heavy duty grinder. If you want more info just post and let me know. I'd be glad to guide you

Jon ... aka "Mouse"

 

Mouse I appreciate that inof. I'm probably going with the Megan header. Now you said to use a grinder to make the headers fit, exactly what do you have to do? Also to let you know I'm probably going to one of my dad's friends who is a Toyota mechanic to get my TRD Front strut tie bar, rear sway, shocks+struts, s pipe, mid pipe and headers put on. I don't have the tools here at my house or a lift But I'll buy those anti foulers like you said. The guy is a certified mechanic and he's been working for over 15 years so I'm sure he can help. But any info from you guys is definately helping. Thank you I appreciate it.

 

don't forget to add a resonator in your midpipe to elminiate the rasp....and just an fyi, your car will smell like **** w/o any more cats...

 

Ok so I have another question. Are there any headers out there that will bolt up to the car with a high perfomance cat? Or is it pointless to even do that?

 

I guess you are some sort of know it all. If so can you explain your post.

Thanks,

Jeremy

 

A resonator is the next thing Im adding.
I would be careful in not running a CAT at all. One it's not legal in any state. They can actually impound your car on the spot for driving that on the street if they find it. And second.... another reason why you should go with a high flow cat if thats the direction you want, is that the cat actually keeps a certain amount of back pressure. if you take that out, you have to get your timing set and a few other things... or you could do a lot of damage to the engine. including breaking valves, etc...

 

Ok so then I'm gonna go with a high flow cat. Where can I pick one up? does the toyota dealership have them and is it a reasonable price? Otherwise I'll just buy one online.

 

they probably would. however, you need to consider something before buying one. Are you going to be running the stock down pipe (s-pipe). if so, they should be able to help you out. I would check out this dealer online. they are really good and generally have good prices too. http://www.trdsparks.com/
they are a perfomance Toyota dealer out of North Carolina

 

I planned on buying an aftermarket S pipe. Now what difference does this make? Trdsparks great site. That's where I got my strut bar, sway bar and shocks/struts

 

the reason it makes a difference is the diameter of the pipe the cat is being put on. it doesnt matter whether you go stock or aftermarket for the pipe. you just need to know the measurements before you buy the cat