E46Fanatics - View Single Post - Under Drive Pulley Kits: Rogue Engineering, Turner Motorsport, or UUC
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Old 01-06-2009, 12:12 AM   #7
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Join Date: Oct 2007
Location: Midwest
Posts: 32
My Ride: 2002 330i
So does underdriving not have a negative effect? Less cooling, battery drain, etc.? Is this the same Ruff of Porsche fame?
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