Cutting the cats
Launching!
Joined: Mar 2022
Posts: 247
Likes: 32
What year do you have ? 93-94 years did not have an o2 sensor after the cat. Id recommend gutting the cat instead. It frees up the exhaust, giving little more horsepower but it very much increases the sound of the exhaust and makes it sound better.
Gutted cats sound like a bucket of fried ********. Cut the cat, flange the ends, flange a straight pipe and bolt it up. Will sound much better, and yes, there will be a significant gain, however you will do much better to go long tube headers, Y-pipe into decent cat back system, or dual exhaust. If you have OBDII you will have to deactivate the rear O2's.
Gutted cats sound like a bucket of fried ********. Cut the cat, flange the ends, flange a straight pipe and bolt it up. Will sound much better, and yes, there will be a significant gain, however you will do much better to go long tube headers, Y-pipe into decent cat back system, or dual exhaust. If you have OBDII you will have to deactivate the rear O2's.
TECH Veteran
Joined: Apr 2008
Posts: 4,985
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97 is OBD2 so if pulling the CATS and 02's you will need to program the PCM or CEL will remain on. No sure how fuel tables are affected without 02 data.
Modern hi flow CATS don't kill much, if any, power.
Export cars built factory did not have CATS.
If emissions is not a issue, long tube headers would be the most power improvement
Modern hi flow CATS don't kill much, if any, power.
Export cars built factory did not have CATS.
If emissions is not a issue, long tube headers would be the most power improvement
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I have a 97 ss. I have hooker shorties on there and I made the pipes coming off the shorties with 2.5" manderal bends going into dual High flow cats that merge with a manderal y pipe. As for the exhaust its the factory dual dual with factory resonators setup from SLP. The car has a very mellow sound. just wondering what the gain is from cutting those cats. I'm pretty decent with my welder so no big deal on making something.
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gutted cats sound like a bucket of fried ********. Cut the cat, flange the ends, flange a straight pipe and bolt it up. Will sound much better, and yes, there will be a significant gain, however you will do much better to go long tube headers, y-pipe into decent cat back system, or dual exhaust. If you have obdii you will have to deactivate the rear o2's.