Type 4 Big Bore Piston Ring Set - 96mm Bore - 1700cc, 1800cc

This replacement piston ring set is designed specifically for big bore Type 4 engines using 96mm pistons, commonly fitted to upgraded 1700cc and 1800cc Type 4 engines in VW Baywindow buses. These rings are intended for engines that have been converted to larger displacement using 96mm barrel and piston kits, rather than standard factory piston sizes.

Piston rings play a vital role in sealing combustion pressure, controlling oil on the cylinder walls, and transferring heat from the piston to the cylinder barrel. When rings wear or lose tension, the engine can suffer from low compression, increased oil consumption, blow-by, and reduced performance. Replacing them during a rebuild or refresh ensures proper sealing and reliable engine operation.

Manufactured as a good-quality reproduction, these rings are made to correct dimensions for 96mm big bore pistons. The reduced ring thickness compared to standard pistons helps improve sealing efficiency and reduces friction, making them ideal for performance-oriented Type 4 builds.

This set includes all piston rings required to fully rebuild one complete engine, supplying rings for all four pistons.

Quality

• Good quality reproduction

Quantity

• Sold as a complete set for one engine

• Includes rings for 4 pistons

Specifications

• Piston diameter: 96mm

• Ring sizes (top to bottom):

  • 1.6mm compression ring

  • 1.6mm compression ring

  • 4.75mm oil control ring

Applications

• VW Baywindow Van: 1972 – 1975

  • Type 4 engines originally 1700cc or 1800cc upgraded with 96mm big bore pistons