MK4 cars changed to a single valve spring design, rather than the established dual spring setup. Most likely done to reduce valve train drag, it limits your ability to run performance cams without additional upgrades. Therefore, when upgrading the cam, we recommend upgrading to Sport-tuned valve springs as well. Upper spring retainers must also change, and lower seats added. Valve springs manufactured from valve train juggernaut Schrick in Germany.
This Part Fits the Following Vehicles