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S63: RPI (Race Precision) Claiming 45 wheel horsepower F10 M5 gains with prototype exhaust

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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.

Quote:

Originally Posted by Eloy@RPI
Our assumptions were correct about the exhaust and we were able to get some insane gains with the prototype exhaust (up to 45whp). AJ and I are now working on improving power throughout the entire band with a new tune. The new tune will take our DP, Exhaust and intake to a whole new level. Stay tuned!


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