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      12-01-2019, 10:17 PM   #5
joeo
First Lieutenant
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Drives: 2009 Crimson Red 135i
Join Date: Mar 2008
Location: Sterling, Va

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2009 BMM 135i  [4.75]
Thanks all - sorry for the delay in responding. Price wise, M-Factory LSD is cheapest; bimmer world sells the wavetrac and clutch style (2 and 3) through diffsonline. Wavetrac is still a good bit less expensive than the clutch style and is basically maint free. While there is a lot of info on the Wavetrac, it's tough to say how well it will do on track.