:D yeah I know its a stupid question, but I was wondering if anyone has tried a custom system on their tC yet and what were your results. I'm thinking about doing a custom system with a universal magnaflow or flowmaster 60 series custom exhaust system. Any input would be appreciated.

Thanks
Tam

Before you even think about it, you should decide how loud you want your car to be. The TRD one might be a little quieter than a custom setup. You should cruise in the car at highway speeds for a while to see whether or not it is loud stock. I thought someone said that cruising rpms were around the 3000 and up range. If thats the case, a custom exhaust is going to be pretty loud on the highway. Also, TRD has been proven to give good results on their products. Unless you're very knowledgeable about cars and their inner workings, I'd just slap the TRD unit on and be done with it.

good point about freeway driving...im lookin for performance as well as sound when it comes to exhaust...so i definately want a cat back...its been discussed that the trd is only and axle back so im going to hold off to wait for aftermarket companies

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I'm getting a custom 3 inch full replacement with a high flow cat to go along with my turbo set up. We'll see how it works. Might need to get a silancer for it as well. :P

I'm getting a custom 3 inch full replacement with a high flow cat to go along with my turbo set up. We'll see how it works. Might need to get a silancer for it as well. :P

a 2.5" would work just fine. 3" might be too big.

I would have to agree. 2.5" should be plenty. If the engine is not tuned for a 3", you might not produce enought back pressure, and burn up your exhaust valves. Then, I'd have to think, your warranty would be shot. something to think about.

I was under the impression that exhaust can be as big as possible with forced induction set-ups and not have any negative repercussions.

Forced induction is out of my league. I know n/a applications. better to talk with someone who knows, but I'd have to say it will depend on whether it's a turbo or a s/c, and if its a s/c, what kind?

dumb question,

where does one find info on the trd exhaust for the tc?

at a dealer, if they can get it(or ebay or any parts site(once the part comes out)). a lot of the cool parts are on back order for a while or aren't available yet.

if you want better performance, go for custom made. TRD is good, but most design is still for street safty.

I'm getting my tc made for 3" catback.

personally i would go for a 2.5 in catback. on a custom exhaust the bends make the pipe smaller then the rest of the unit.

i do hope you know how the make a custom exhaust right? first they take a long straight pipe(lets say 2.5 inch) and they bend the pipe to match up as close as possible to the stock unit. which isn't good because when they actually bend the pipe the corners of the pipe get much smaller. so, when most of the pipe is 2.5 inch, and in the corners it could be like 2 inch for instance. OR if you are going to do a custom setup, you can ask the shop to make a straight pipe for you. :lol: as for a catback, it should be a full 2.5 inch from the inlet to the exhaust outlet of the catback.

no worry about the size, yes it is custom made. The shop will take care, the exhust will be 3" also if i custom made the catback for 3"

personally i would go for a 2.5 in catback. on a custom exhaust the bends make the pipe smaller then the rest of the unit.

i do hope you know how the make a custom exhaust right? first they take a long straight pipe(lets say 2.5 inch) and they bend the pipe to match up as close as possible to the stock unit. which isn't good because when they actually bend the pipe the corners of the pipe get much smaller. so, when most of the pipe is 2.5 inch, and in the corners it could be like 2 inch for instance. OR if you are going to do a custom setup, you can ask the shop to make a straight pipe for you. :lol: as for a catback, it should be a full 2.5 inch from the inlet to the exhaust outlet of the catback.

2.5 inch catback is good enough for me. my cousins 240sx, he has a 3 inch obx cat back, extremely loud...

I'm going to go with a catback. The price of the TRD system is rediculous for just an axleback.

how much TRD charge? is 2.5" or.....

I'm going to go with a catback. The price of the TRD system is rediculous for just an axleback.

go with a custom exhaust, because the TRD only makes 2hp. If you go with a N/A set-up use 2.25" piping and for turbo do 3" piping.

go with a custom exhaust, because the TRD only makes 2hp.

are you kidding? Is that written somewhere? Why would they bother to make an exhaust that only gives you 2hp.

I was waffling between going with the TRD or waiting for Magnaflow or someone to come out with a catback, but I think I've decided...

i orderd mine with a trd exhast i dont need hey look at me anoying loud exhaust. just my 0.2

hey naztytc are you from worcester ma? I live in leicester and have yet to see another tc on the road.

yup worcester ill have my car by mid week next week i havent seen one on the road yet here hopefully ill be the first in worc. :D

I'm getting a custom 3 inch full replacement with a high flow cat to go along with my turbo set up. We'll see how it works. Might need to get a silancer for it as well. :P

a 2.5" would work just fine. 3" might be too big.

For a turbo car, the bigger the better... You DO NOT want any back pressure with turbo set ups.

im doin a custom exhaust its still in the works but it should reduce the restriction and it will be quit but with a nice purr........
i think it should gain quit as much as a trd exhaust but i wont know until it hits the DYNO! ill you guys posted on my process with pictures soon

I was waffling between going with the TRD or waiting for Magnaflow or someone to come out with a catback, but I think I've decided...



don't by magnaflow because it would not perform as well as HKS, GREDDY, APEXI, or ect.

TRD exhaust is actually 2hp gain??? im not so sure... the minumum is usually 5hp....

personally i would go for a 2.5 in catback. on a custom exhaust the bends make the pipe smaller then the rest of the unit.

i do hope you know how the make a custom exhaust right? first they take a long straight pipe(lets say 2.5 inch) and they bend the pipe to match up as close as possible to the stock unit. which isn't good because when they actually bend the pipe the corners of the pipe get much smaller. so, when most of the pipe is 2.5 inch, and in the corners it could be like 2 inch for instance. OR if you are going to do a custom setup, you can ask the shop to make a straight pipe for you. :lol: as for a catback, it should be a full 2.5 inch from the inlet to the exhaust outlet of the catback.
you could always just get your exhaust mandrel bent.

if you want better performance, go for custom made. TRD is good, but most design is still for street safty.

I'm getting my tc made for 3" catback.

I think the TRD design is due to the fact that the center pipe on the scion tc has a cat in it . The tc has a main cat up front in the manifold with a a/f sensor in front of it and a O2 behind it in the front pipe , center pipe with a secondary cat then rear pipe with muffler.
TRD or anyone else could not make a legal pipe for highway use that would replace the center section and still pass federal emission laws, so the next best thing is the axle back system. You won't find to many shops that are willing to make a system to do away with the center pipe and cat due to fines and I know in Va. they can lose there inspection lic. I am sure there are some that will if you look around . Also in Va it would not pass state inspection I don't know about other states . Just some things to think about before you mod. the exhaust.
One other thing if you do cut the center pipe and end up having to replace it the selling price is around $1100.00

you can still get a catback though, which wont drastically affect emissions since only the piping after the cat is replaced..the TRD one is only axle-back (aka resonator back) which is turning people off..

you can still get a catback though, which wont drastically affect emissions since only the piping after the cat is replaced..the TRD one is only axle-back (aka resonator back) which is turning people off..
Look, there are only four sections to the tC exhaust: manifold, front section, center section with cat, and behind axle section. Unless you're going to cut and weld the center section, there is no way to do a "cat-back". The TRD exhaust is as close as you'll get to a regular cat-back.

the reason why it only creates 2HP is because the engine is tuned to maximum efficiency from the factory. the camry engine puts out 157HP, the tC has been tuned up to 160 obviously. it is kind of a shame that you can't really squeeze more power out of the car without forced induction. the chance of you noticing the CAI and TRD exhaust power is negligible. i think it's possible that with a header combination as well you might actually see some kind of a power difference, but until then or F/I ...

you can still get a catback though, which wont drastically affect emissions since only the piping after the cat is replaced..the TRD one is only axle-back (aka resonator back) which is turning people off..
Look, there are only four sections to the tC exhaust: manifold, front section, center section with cat, and behind axle section. Unless you're going to cut and weld the center section, there is no way to do a "cat-back". The TRD exhaust is as close as you'll get to a regular cat-back.
oh ok, i got you now :D my plan is going to be getting my custom axle-back setup for now. If i end up going FI (which im still unsure of), then i will go for a custom midpipe with high flow cat and aftermarket resonator.