90.5mm + 92mm Barrel Spacer Kit (0.060" Thick) - Type 1 Engines

Cylinder base shim set for aircooled VW Type 1 engines fitted with 90.5mm or 92mm cylinders and pistons.

These precision shims fit between the cylinder barrel and crankcase to increase deck height and alter engine compression ratio during assembly. By spacing the cylinders further away from the crankcase, combustion chamber volume is increased, helping reduce compression while providing the required piston-to-head clearance for performance engine combinations.

Cylinder base shims are commonly used on 1776cc, 1835cc and stroker engine builds where larger deck height corrections are required. They are also useful for compensating for flycut cylinder heads, longer stroke crankshafts and other engine machining modifications.

Designed for use with 90.5mm and 92mm barrels commonly fitted to performance Type 1 engines.

Manufactured to 0.060″ thickness (1.524mm), making them suitable for substantial deck height and compression ratio adjustments.

Sold as a set of 4, enough for one complete engine.

We recommend accurately measuring deck height and calculating final compression ratio before final engine assembly. Cylinder seating surfaces should always be clean and flat during installation.

Specifications:

• Fits 90.5mm and 92mm cylinders/barrels
• Thickness: 0.060″ (1.524mm)
• Fits Type 1 aircooled engines
• Quantity: Set of 4
• Fits between cylinder and crankcase

Applications:

Aircooled VW

• VW Beetle, 1960–1979, performance Type 1 engine applications
• VW Splitscreen Bus, 1960–1967, upright Type 1 engine applications
• VW Baywindow Bus, 1968–1979, Type 1 engine applications
• VW Karmann Ghia, 1960–1974
• VW Type 3, 1961–1973, upright Type 1 engine applications
• VW Type 181 Trekker, 1968–1983
• VW Buggy and Baja models using 90.5mm or 92mm Type 1 engines