Thread: BMW Performance Exhaust question (135i)
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      08-24-2008, 09:07 AM   #2
TT1351
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Drives: 135, GTS, E30 M3+
Join Date: Dec 2008
Location: Massachusetts

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I think BMW claims about 5 HP increase for the exhaust, according to their accessory catalog. Torque I haven't seen any figures on.

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