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      09-07-2012, 11:46 AM   #52
IND-Distribution
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Drives: G80 M3 / G82 M4
Join Date: Oct 2006
Location: Chicago

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Quote:
Originally Posted by Rotorocious View Post
Interesting. I've tested the car with open downpipes and didn't get a similar result.
A tune is definitely needed.

Not to nitpick but wouldn't run 4 usually be the before run and 6 the after exhaust run?
A tune will absolutely add extra power. The stock runs were done in a different grouping, and so are numbered independently.
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