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      05-12-2010, 12:02 AM   #37
swamp2
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Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

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^

The best bang for the buck mods are (roughly in order):

-X pipe with secondary cat delete
-High octane fuel
-ECU software (perhaps matched for the above mods)
-Pulleys
-Titanium cat back exhaust (weight drop and small power bump)
-Increase redline

Some might argue for a high flow air filter but I'm not convinced these actually add power.

With these mods you can count on 30-35 hp gain for about $6k. This car will leave any FD ratio modded stock M3 in the dust.