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      10-15-2012, 05:16 PM   #18
nerwyll@trinityautosport
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Drives: Jet Black e92 M3
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Quote:
Originally Posted by pbonsalb View Post
How much power does a rear exhaust add on a supercharged car? It adds nothing or very little on a naturally aspirated car. A good x-pipe adds up to about 25 rwhp on a naturally aspirated car, so I see those gains being leveraged by boost on a supercharged car.
correct, we were expecting around +30whp for sure with the x-pipe initially. next we want the rest of the RPI setup mainly to improve the sound, but the real gains of an exhaust are from the x-pipe/cat delete.