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      09-24-2011, 12:04 PM   #1
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, Brembo, GIAC, Koni, Ohlins, Performance Friction, Quaife, Stoptech, Vorshlag

Posts: 11,261
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TEASER: HP Autowerks 1M with Berk Technology Race Exhaust

This exhaust sounds good.

It is a race exhaust so some droning at cruising rpms. The system consists of a replacement resonated midpipe and newly developed axle back race muffler. There is a noticeable gain in power. The midpipe added the most power and the race muffler supplemented.


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