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Straight pipe? #4264 Feb 19, 9:41am Feb 19, 9:41am

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Straight pipe?
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

Re: Straight pipe? #4265 Feb 19, 10:11am Feb 19, 10:11am
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2001 Spec Blue Toyota Celica
Grand-Touring-Dan
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2001 Toyota Celica
Grand-Touring-Dan
2001 Spec Blue Toyota Celica
ECelica Staff
2001 Toyota Celica

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Houston, TX
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.

Re: Straight pipe? [Re: Grand-Touring-Dan] #4266 Feb 19, 10:47am Feb 19, 10:47am

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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?

Re: Straight pipe? #4267 Feb 19, 11:35pm Feb 19, 11:35pm
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1985 Toyota Corolla GT
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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
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1985 AE86 GT-S - built 4AGTE, SOLD 10/2009
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Re: Straight pipe? [Re: JDMCelicaGTS] #4268 Feb 23, 8:02am Feb 23, 8:02am
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maryland
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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

Re: Straight pipe? [Re: celicaguy] #4269 Feb 23, 9:20am Feb 23, 9:20am
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eNinja
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2002 Toyota Celica
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2002 Toyota Celica

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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.

Re: Straight pipe? [Re: eNinja] #4270 Feb 23, 2:35pm Feb 23, 2:35pm
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maryland
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maryland
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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