94mm Barrel Spacer Kit (0.040" Thick) - Type 1 Engines

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

These precision-engineered shims install between the cylinder barrel and crankcase to alter engine deck height and compression ratio during assembly. Increasing the cylinder spacing increases combustion chamber volume, helping reduce compression while ensuring correct piston-to-head clearance on performance engine builds.

Cylinder base shims are commonly used during 1914cc and larger displacement engine builds where accurate deck height setup is essential. They are also ideal for compensating for flycut cylinder heads, crankcase machining or longer stroke crankshaft installations during engine blueprinting.

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

Manufactured to 0.040″ thickness (1.016mm), making them suitable for larger deck height adjustments and moderate compression ratio correction.

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

We recommend carefully measuring deck height and calculating final compression ratio before final engine assembly. Always ensure cylinder seating surfaces are clean and flat during installation.

Specifications:

• Fits 94mm cylinders/barrels
• Thickness: 0.040″ (1.016mm)
• 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