Underdrive pulley kit?
10-28-2005, 09:44 PM
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BMW E39
Underdrive pulley kit?
http://www.evosport.com/product/prod...VO.PER.M20.P01
Anyone have any experiences with these? How much of a performance increase do these things give? Reliable? Thanks for any input.
Anyone have any experiences with these? How much of a performance increase do these things give? Reliable? Thanks for any input.
