01 SSEI EXHAUST - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 07-06-2006, 03:14 AM   #11
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That is a seriously thick walled pipe. The OD was about 2.8" from what I remember, normally that qualifies as 2.75. The OD was still .25" bigger than my '95 though which makes me think that the gen 2 engine gained some HP over the gen 1 because of the better exhaust.
So to get this straight, we have two 2" pipes joining into a single 2 1/2" that joins into the 2 1/2 inlet cat? Did you change your cat? I'm debating on whether it is worth it. I'm planning only moderate mods to my car (either intense step one or two) I remember when I changed the cat on my '95, I lost a tiny bit at low RPM and gained slightly at high RPM. No net gain.
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Old 07-06-2006, 08:32 AM   #12
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Stock exhaust was good to about 340 wheel horsepoweror 425 crank horsepower. After that it was a major restriction.
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