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      03-01-2011, 07:23 PM   #8
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Drives: 2009 Silverstone M3 Coupe
Join Date: Aug 2009
Location: San Diego, CA

Posts: 195
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If there was a rear section + tune that could produce 40RWHP we would all have it. This guy is 100% wrong on everything. Full catless exhausts from reputable companies like Dinan and Akrapovic only claim 25HP with a tune. Check Dinan's site for their "white paper" article on backpressure. It's a good read.
2009 Silverstone II E92 M3 Coupe - DCT
Dinan Exhaust, RPi scoops, Dinan Tune, Dinan Pulley, BMC filter, LCI Taillights, MS 15mm spacers, Huper Optik tint.
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