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hey guys..i was bored today so i made up a cat delete pipe for the t/a.I went to partsource and got two 18" pieces of 2 1/4" exhaust that were flared on both ends.i hacked the cat off my y pipe(y pipe and cat were off car) I also managed to cut off and reuse the little socket flange thing that was on the back of the cat. Should be done tommorow will post pics.
I did that to my car last thursday. I used 2.5 inch pipe. It was a perfect fit. I reused the flange off my cat and painted the flange with a high temp black engine enamel. It looks pretty killer.
I did that to my car last thursday. I used 2.5 inch pipe. It was a perfect fit. I reused the flange off my cat and painted the flange with a high temp black engine enamel. It looks pretty killer.
Any difference in power or sound? I am considering hollowing out mine, so it still looks like its there for the cops. I think its going bad anyway, because when the car went through emissions last june (right before I bought it) it only passed by 1 ppm on the HC's. So I doubt it would pass now with 10k more miles.
Also, I am starting to get a "rattle" under the car, at certian RPM. Sounds like a heat shield does when it gets loose, except alot quieter and duller.
__________________ -Adam
1990 Firebird Formula
Bone Stock 305TBI, T5 tranny, 62k Origional
UMI subframe Connectors
It made a lot of difference with the sound. I installed the hooker cat back with the cat on at first and I could barely hear it running. I replaced the cat with the pipe and it is loud now, but it has a really good tone. It sounds great in my opinion. As for power increase, i don't feel that much of a difference, but the sound makes it feel like I am driving a pro mod .
Any difference in power or sound? I am considering hollowing out mine, so it still looks like its there for the cops. I think its going bad anyway, because when the car went through emissions last june (right before I bought it) it only passed by 1 ppm on the HC's. So I doubt it would pass now with 10k more miles.
Also, I am starting to get a "rattle" under the car, at certian RPM. Sounds like a heat shield does when it gets loose, except alot quieter and duller.
dahm dude, u put 10k on that already.. u need a daily driver. and my advice would be, dont mess with youre cat until u have a decent cat back on there. first off it will be a major p.i.t.a. on a old stock rusty system and not worth the gain/sound IMO... so stop abusing that good looking formy and SELL IT TO ME!!
It made a lot of difference with the sound. I installed the hooker cat back with the cat on at first and I could barely hear it running. I replaced the cat with the pipe and it is loud now, but it has a really good tone. It sounds great in my opinion. As for power increase, i don't feel that much of a difference, but the sound makes it feel like I am driving a pro mod .
i don't mean to jack this;
do u have a sound clip?
i have the Mac test pipe with air tube. i am also waiting for the mac Y-pipe to come in. i'm still deciding on what cat back i want and the hooker c/b is still in the running. i've got it down to flows,hooker,magnaflow,or spintech.i am leaning towards the spintech at this point. i'm not crazy about the how the flows sound on a reving decell.
but i would like to hear the hookers with a test pipe and not a hollowed out cat. the sound is much better when there is a pipe.
a hollowed out cat sounds too tiny,from i have heard.
thanks.
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