94mm Barrel Spacer Kit (0.030" Thick) - Type 1 Engines

Cylinder base shim set for aircooled VW Type 1 engines using 94mm cylinders and pistons.

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

Cylinder base shims are commonly used during performance engine builds, especially on 1914cc and larger displacement Type 1 engines where accurate deck height measurements are critical. They are also useful when compensating for flycut cylinder heads, crankshaft stroke increases or other machining work during engine blueprinting.

Designed for use with 94mm barrels commonly fitted to high performance and stroker Type 1 engines.

Manufactured to 0.030″ thickness (0.762mm), making them suitable for larger deck height corrections and moderate compression ratio adjustments.

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

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

Specifications:

• Fits 94mm cylinders/barrels
• Thickness: 0.030″ (0.762mm)
• 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 94mm Type 1 engines