What kind of HP gain and sound difference would I gain from switching out my GM exhaust-80 series Flowmaster muffler to a Corsa system?

Thank you

 

I love the sound of my Flowmaster 80 on the otherwise stock WS6 exhaust.

Performance gains? I can't answer that one ... I bought this car used and don't have before/after dyno results.



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2001 TransAm WS6, M6 3.42
HPP, TBB, 160* t-stat, MTI Lid, Holley PowerShot, Flowmaster 80, Port/Polish MAF

2001 Z28
-- R.I.P. - 06/25/02

 

I have 2002 Z28 i like the look of the stock tips so i just had a flowmaster put in place of the stock muffler. I love the sound and its not bad in the car driving normal. At about 3000 RPM and up it screeeeeems. I was pulling out of my apartment complex Friday night about 500 yeards up the road. The wife was in bed and she heard me get on it when i was pulling out. kicked her sideways hit the rev limiter by mistake, droped it in 2nd hammerd the gas and took off WIFE WAS SLEEPING she wasnt after that. So it must sound good. I still have not let anyone drive her yet so i dont know how it sounds outside the car. but people have told me it sounds good.


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"Mustang Killer"
Black 2002 Z28 M6 T tops
SLP LID
SLP BELLOW
K&N Fillter
FlowMaster

 

I had the flowmaster with the 3 1/2 tips put on my car for about $200. It is very loud about 3000 rpm. It is also much cheaper than the other systems. Dyno tests show basically the same results for all the systems. If you are going to later do the headers go with the flowmaster can be easliy fit together.