This is a brand new Pair of High Performance Cylinder Heads for a VW Type 1, 2 or 3 Dual Port 1600cc engine. Heads come with Stainless Steel 40mm Intake and a Stainless Steel 35.5mm Exhaust Valves, with Harden Keepers, Chromoly retainers, and Single high- rev springs. Ready to install on engine's that have a 90.5/92mm Bore. Engine: VW Type 1, 2 and 3 1600 Dual Port. CYL Bore: 90.5/92mm. Valves: 40 by 35.5. Please see my other adds for 8.5mm and 94mm Bore. For more Stock & High performance parts &. For VWs, Porsches & Subarus. We cannot guarantee product compatibility. If unsure that this product is correct for…