Does the performance exhaust systems make any performance difference?
Thread Starter
Racer
Joined: Feb 2004
Posts: 402
Likes: 72
From: huntington ny
Does the performance exhaust systems make any performance difference?
Do the aftermarket exhaust's re:Borla, Corsa, B&B make any performance difference? They claim a 10 to 15 HP increase over stock but does that really make the car faster or does it just sound faster?
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by Sully C5
Cat-back exhaust are for sound only. Since the flow is limited by intake, opening up the mufflers won't increase HP.
Roger that 
Lifetime Member
Joined: Dec 2002
Posts: 10,702
Likes: 76
From: New Jersey
St. Jude Donor '05, '12-'13, '15-'16, '21
Originally Posted by Sully C5
Cat-back exhaust are for sound only. Since the flow is limited by intake, opening up the mufflers won't increase HP.
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So..... I DON'T have 400 HP now? 
Burning Brakes
Joined: Jul 2003
Posts: 1,233
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From: Drivin' and Divin' in Seattle
Originally Posted by Sully C5
Cat-back exhaust are for sound only. Since the flow is limited by intake, opening up the mufflers won't increase HP.
You need to put a blower on there to cram more air in
Team Owner
Joined: Aug 2002
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Tech Contributor
Cruise-In 11 Veteran
NCM Ambassador
St. Jude Donor '05-'06-'07-'10
All I've done to my car is a Blackwing and a Corsa touring. I have a '97 which starts at 345 at the crank. If I subtract the drivetrain loss which is estimated at 14% for a mn6 I should have been at 296.7 stock at the rear wheels. I had my car dynoed last month and I pulled at 308.7 at the rear. I have a gain of 12 rwhp over my calculated rwhp (or 14.3 at the crank) I am betting the split is 85/15 for intake to exhaust.
Paul
Paul
