The OE knuckle is retained and upgraded with our spherical bearing conversion for the upper knuckle mount

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Yellow Spring rated -22 to -20 InHg (installed) and a Gasket

Unplug and unbolt your OEM Valve

it has to be sourced from BMW E90

Clutch Kit - Xtreme Outback - Extra Heavy Duty Organic KGM22016-1AX SL-02 The OE knuckle is retainedXtreme Outback Heavy duty sprung organic kit 1A Recommended for: Vehicles with significant performance modifications, are daily driven but also used off road and vehicles that tow regularly. The Extra Heavy Duty range of upgrades from Xtreme Outback are designed to offer the highest levels of performance for heavily modified street and off road vehicles. These kits offer a significant increase in clamping force (30 60% above the factory clutch) over