09-11-2012, 03:54 AM #1
RPI (Race Precision) Claiming 45 wheel horsepower F10 M5 gains with prototype exhaust
So is the exhaust a big bottleneck on this car? RPI is claiming some huge gains with a prototype exhaust although no pictures or graphs were posted.
Originally Posted by Eloy@RPIStage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale
09-11-2012, 04:24 AM #2Senior Member
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Does it include downpipes? S63tu has BIG cats in the downpipe and you can unleash some power by removing it. But is it worth 45hp? I highly doubt that. The stock exhaust must be so $#@!ty.
09-11-2012, 04:27 AM #3
Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale