Catless exhaust system = yellow stuff?
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07-04-2009, 10:08 PM
Drives: '09 Cpe Silverstone FR 6MT
Join Date: Nov 2008
BTW, prior to the cats the exhaust is about 900-degrees F while after the cats the temps reach around 1300 F. That's speaking generically. The M3 may be more or less.
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