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      01-06-2013, 06:21 PM   #3
Lieutenant Colonel
Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

Posts: 1,547
iTrader: (3)

Let's say you gained 15 rwhp up top. If you are making in the 350 rwhp range, you are talking about a 4% gain. Not many people can feel that kind of a gain and you are right that it won't be dramatic. Add a tune and you might get anothe 10-15 rwhp. Added to the test pipes, the total is more noticeable.
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