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Anonymous Feb 19, 5:41pm - #4264 
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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
Joined: Dec 2002
Posts: 1,660
Grand-Touring-Dan
ECelica Staff
Grand-Touring-Dan Feb 19, 6:11pm - #4265 
2001 Spec Blue Toyota Celica
ECelica Staff
2001 Toyota Celica

Joined: Dec 2002
Posts: 1,660
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.

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Anonymous Feb 19, 6:47pm - #4266 
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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?
Joined: Jul 2002
Posts: 182
JDMCelicaGTS
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JDMCelicaGTS Feb 20, 7:35am - #4267 
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1985 Toyota Corolla GT

Joined: Jul 2002
Posts: 182
SGV*S.Ca
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
celicaguy
Member
celicaguy Feb 23, 4:02pm - #4268 
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Joined: Feb 2003
Posts: 296
maryland
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
eNinja
Member
eNinja Feb 23, 5:20pm - #4269 

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2002 Toyota Celica

Joined: Sep 2002
Posts: 209
san antonio, texas
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
celicaguy
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celicaguy Feb 23, 10:35pm - #4270 
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Joined: Feb 2003
Posts: 296
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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