Cylinder shim set Inner diameter: 90 mm Thickness: 1.016 mm Bore: 77.0, 83.0, 85.5, 87.0 and 88.0 mm thickness 4 pieces. For adjusting deck height without machining the pistons Typ1 Motor VW Käfer VW Bus T1 VW Bus T2 VW Type 3 VW Karmann Ghia VW 181   ref