When revving your FSI engine higher than stock, you run into the problem of rocker arms falling off, and breaking spring clips. This can cause severe damage to your engine. These Ferrea lifter shims will shorten the travel distance of the lifters, and prevent the risk of breaking the rocker arms and lifters. The install in simple, by just placing them below the hydraulic lifters.
A must for FSI engines revving higher than stock!
Sold as a complete set of 16.