KW Update and Refurbishing Service for our S13 Drift Grip Project Car!

Next, the valve stack is put together. The valve stack controls mostly the high-speed compression damping and the blow-off point.  The EXR valve system uses these Belleville washer-like valve shims. Their large diameter and short travel mean a very quick reaction time giving the EXR shock very low hysteresis.

The shims are stacked up to ready them for installation.

They are dropped in place on top of the valve body.

Next, the low-speed valve assembly is prepped for installation.

It slides through this cap and is lowered down on top of the high-speed valve stack.  This not only contains the low-speed valve but also controls the preload and the adjustability of the high-speed shim stack.

Here it is as it is lowered in place.  In the previous photo, you could see the adjustment threads on this part.


  1. What’s always interesting is seeing how different KW’s valve design philosophy is compared to the Bilstein/Ohlins/Penske/etc deflective disc pistons… but obviously it works, and works well. Cool that they’re doing rebuilds in-country too, thank you for sharing all of this.

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