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two O-rings for chain tensioners
We recommend replacing the sprocket if it shows any signs of wear
The factory diagnostic tools require specialized programs on dedicated laptops that are a pain for the average DIYer to set up and use
this Genuine BMW replacement chain guide rail will keep everything on track and tight
S54 Noise Reduction Kit S54Core two O-rings for chain tensionersThe S54 Noise Reduction Kit is designed to reduce excessive valve train noise commonly found on the S54 engine. The kit includes: 1 modified Intake splined gear (with anti rattle modification) 1 modified Exhaust splined gear (with anti rattle modification) 2 REM coated cam sprockets Price: $300, plus $200 refundable core deposit Return your old gears with the supplied return shipping label for a $150 core refund
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