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#4264 Feb 19, 10:41am
Anonymous
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I have a 01' gt auto, with an injen long ram cai and a "custom" exhaust, just took off the stock muffler and made a pipe leading to an aftermarket muffler, and i was wondering if its a good idea or a bad idea to cut out my cat and resonator and just have a pipe going from the engine striaght to the muffler

#4265 Feb 19, 11:11am
Joined: Dec 2002
Posts: 1,660
ECelica Staff
2001 Toyota Celica
ECelica Staff
2001 Toyota Celica
Joined: Dec 2002
Posts: 1,660
You won't pass emissions, and your CEL will come on if you remove your cat. The resonator is safe to remove, its just louder. Some people say it is too loud and they put it back on. I am going to remove my resonator as soon as I get a high flow cat.

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how much of a hp gain would i get from takin off the resonator and puttin on a high flow cat?

#4267 Feb 20, 12:35am
Joined: Jul 2002
Posts: 181
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1985 Toyota Corolla GT
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1985 Toyota Corolla GT
Joined: Jul 2002
Posts: 181
why dont you just get a TRD/kazuma exhaust? if you want loud and high flow,thats the way to go. No cat, no resonator.. loud as hell. and if your wondering if the CEL will go on because of no cat, it wont because the kazuma has a place where you put the O2 sensor.


2000 GT-S - SOLD, 12/2003
1986 AE86 GT-S - STOLEN, unrecovered, 2/2004
1985 AE86 GT-S - built 4AGTE, SOLD 10/2009
2004 Camry LE, SOLD, 5/2007-10/2007
1994 GS300, 2JZGTE, HKS T04Z, 10/07-Current

Joined: Feb 2003
Posts: 296
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Joined: Feb 2003
Posts: 296
I am putting a Kazumi exhaust on my 02 gt next week...you can actually order it through the toyota dealer.But you can get it cheaper through wctoyota.it wont pass inspection simply because its a race exhaust.you can go to wctoyota and download a clip of what it sounds like..loud as hell and awesome sound

Joined: Sep 2002
Posts: 209
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2002 Toyota Celica
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2002 Toyota Celica
Joined: Sep 2002
Posts: 209
DONT DO IT!!! shocked trust me. i have trd exhaust and i ran a straight pipe and ive regretted it ever since. it sounded like rice. cmon this is a 1.8 liter here. i put it all back but the muffler shop messed up my o2 sensors in the process. if you do anything, leave the cat on, and take out the resonator.

Joined: Feb 2003
Posts: 296
Member
Member
Joined: Feb 2003
Posts: 296
The parts guy at my dealership assured me that it was a cat-back system.Is he full of crap or what here?!He said it wont hurt my warranties in any way.

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