501 Series Performance Heads 42 by 37.5 Valves, Pair 500 This is a replacement ring

This is a replacement ring set for our VW9600T4S66 and VW9600T4S66P kits

This is a new set of 94mm Racing Long Thick Wall Type 1 Cylinder Set

8L type 4 Casting with Breather using 8mm valve stems it is available with Single high rev springs

The 35mm Compression Height will work with larger stroked cranks 78

501 Series Performance Heads 42 by 37.5 Valves, Pair 500 This is a replacement ringThis is a brand new Set of 501 High Performance Cylinder Heads for a VW Type 1 2 or 3 Dual Port. Heads comes with Stainless Steel 42mm Intake and a Stainless Steel 35. 5mm Exhaust Valves, with Harden Keepers, Chromoly retainers, and Single high rev springs. They areready to install. The 501 Series Castings come STD with: Increased material at the intake surface giving you the ability to make much bigger ports. A modernized Combustion chamber, for