The crank damper and timing belt driver gear interface is one of the most sensitive issues with the 1. 8T/fsi engine in performance applications. This interface does not have a high safety factor from the factory, and when combined with higher rpm, it can often fail. The loss of timing often causes massive destruction, either bending valves or worse, breaking them off and destroying the valve/head/pistons. Recently, integrated engineering has spent significant time working to improve this interface. We have launched dowel pin kits which allow the installation of a high strength alloy steel dowel pin to prevent rotation of the joint in the event that friction is overcome. Also, we have collaborated with arp to produce this aerospace grade fastener which allows a higher clamping load on the timing belt pulley to be used. This ensures that the joint will not slip and shear the keyway. In addition, these high quality fasteners are far more consistant then the factory pieces. The factory bolts are frequently quite beat up because they are shipped loosely without thread protection- this can lead to erratic clamping loads.Features.Increases clamping force on the gear by 10%.Totally reusable.Made to the highest quality standards.Extremely consistant clamping.Threads rolled after heat treat.This is an integrated engineering exclusive part!.Will fit all late 06A 1. 8T/2. 0T fsi engines!.