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      08-21-2019, 07:42 AM   #67
Brady154
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Drives: 2014 335i M-Sport
Join Date: Apr 2019
Location: Houston

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Haven't pulled the trigger yet, but it's gonna be 2900 for a wavetrac then install labor. I found this out about the quaife " The Wavetrac will do everything the Quaife will, but when you lift a wheel the Wavetrac will still provide drive, but the Quaife won't. The Quaife will act like an open differential on wheel lift situations"
I went with the M Factory helical diff. It was $3000 installed. I've had it on the track once since then. It was hard to tell much difference, because my tires were smoked and it was over 100 degrees that day. There wasn't much grip to be had.
Sweet that's what ecs carries right?
Yes, but the shop that did mine got it from someone else. Looks like ECS has some on scratch and dent sale now.
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