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Originally Posted by ty056r
I don't have cat delete pipes, but just ordered a Stebro racing exhaust and want to add the GIAC and headers to my 2000S. What type of gains (HP) should I expect from the GIAC and headers?
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Let me find my dyno graphs for you. If I remember correctly it was around 10% gain at the wheels. By far the best mods for 986.