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08-20-2002, 08:17 PM
So far, I just know of the AA exhaust has a proven 7.7 hp gain. Anyone else know of any exhaust performance gains? I also heard that the WHOLE SUPERSPRING SETUP is about 15hp gain. But that's just theoretically..anyone tried it?

08-20-2002, 08:47 PM

08-20-2002, 09:34 PM

08-20-2002, 10:54 PM
I do feel there was a hp gain in the upper ranges of the tach, and the sound is a huge step in the right direction vs. the stock exhaust. Blipping the throttle is a pure joy. Dave.

08-21-2002, 02:35 AM

08-21-2002, 10:24 AM
They have said they are concentrating hard on the M5/540 because of the people leaving for E55s. Dinan also went on to say that their next project is the new M3, this was said at Summerfest and in a couple of the rags this month.

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