DBW Driverpak 87mm Big Valve Top End Rebuild Kit for VW Type 1 Engines 1641cc. DBW Driverpak top end rebuild kit for 1966-79 VW Beetle, Karmann Ghia, Type 3, Thing, and Bus with Type 1 engines. This kit features 87mm pistons & cylinders,'big valve' cylinder heads with 40mm intake and 35mm exhaust valves, Elring gasket kit, and stock style replacement pushrod tubes. We recommend inspecting the bottom end while the pistons and cylinders are removed for any excess bearing play Includes all new pistons & cylinders, wrist pins, rings, cylinder heads, gaskets, and pushrod tubes.
Cylinder heads use 12mm 3/4 inch spark plugs and have approximately 53cc combustion chambers.