exhaust question [Archive] - GrandAmGT.com Forum

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Bonnor
05-16-2006, 04:39 PM
i have a quick question about teh stock exhaust on the 99 and up grand am gt...is there a rezonator right behind the catalytic converter or not? it looks like there is 1 but i'm not too sure...and if i cut the catalytic converter off do i have to get a cheater sensor that tells teh computer that the emissions are fine?

digitalballz
05-16-2006, 07:31 PM
yes.....yes

Bonnor
05-16-2006, 10:01 PM
so i can cut teh rezonator off and it shouldn't set off the emmisions sensor? and what is teh cheater sensor called?

timka86
05-16-2006, 10:03 PM
so i can cut teh rezonator off and it shouldn't set off the emmisions sensor? and what is teh cheater sensor called?


O2 simulator, on PFYC.com.

Bonnor
05-16-2006, 10:05 PM
ok...thanks...do i need to do anything else to it if i want to cut the cat off?

timka86
05-16-2006, 10:09 PM
ok...thanks...do i need to do anything else to it if i want to cut the cat off?


not that i know of except putting on a new, maybe a high flow cat, cuz if you have to go for smog testing, you will fail. Are you straight piping it?

Cuz if you want the exhaust louder, cutting the resonator off will make it louder, cutting the cat off will prolly make even louder, and free up the flow, but no way are you going to pass emissions if they run your car. Usually newer cars they just check for Engine codes, sometimes they run the car and test the gases coming out.

Bonnor
05-16-2006, 10:20 PM
i put a flowmaster on it...and didn't have very much time to do it because i had another appointment to go to and i just took a quick glance under the car and was wondering if it was a rezonator because with the flowmaster on it...it sounds like a damn fart pipe on it

timka86
05-16-2006, 10:24 PM
i put a flowmaster on it...and didn't have very much time to do it because i had another appointment to go to and i just took a quick glance under the car and was wondering if it was a rezonator because with the flowmaster on it...it sounds like a damn fart pipe on it


I got a flowmaster (flo 42583) as well, 80 series, with one 2.5" in, and two 2.5" outs.
I'm pleased with how it sounds.

Which one did you get?
If you're not satisfied with the sound, first try to get rid of the resonator. Also remember that it'll get louder within about a week of driving.

Bonnor
05-16-2006, 10:30 PM
it's a 40 series from a camaro that i put on it with a 3" in and w 3" outs

timka86
05-17-2006, 06:58 AM
it's a 40 series from a camaro that i put on it with a 3" in and w 3" outs


as far as a read on the 40 series, they're louder. There was a thread somewhere here about it.

williamGT
06-11-2006, 10:42 PM
I have a borla catback on my 2002 gagt if i take the resonator off will it sound better? or ****ty?

lironet
06-12-2006, 08:57 AM
I have a borla catback on my 2002 gagt if i take the resonator off will it sound better? or ****ty?

Better

williamGT
06-12-2006, 12:53 PM
okay thanks

williamGT
07-25-2006, 11:43 PM
Better
Okay I gut the resonator, but it sounds the same it has been 3weeks now......Is the muffler still breaking in? I had the exhaust since april 06.