87mm Piston & Liner Set (1641cc) – 311-198-06987T The 311-198-06987T is the easiest way to add a noticeable boost in torque and horsepower to your classic Volkswagen. By increasing the bore from the stock 85.5mm to 87mm, you effectively bump your displacement to 1641cc. Because these are "slip-in" style, they are a favorite for garage builders looking for extra performance during a routine top-end refresh without the expense of a machine shop. The cylinders are made from durable cast iron for excellent heat dissipation and wear resistance, while the pistons feature a standard 39.50mm compression height, keeping your geometry close to factory specifications. Detailed Vehicle Compatibility VW Beetle (Standard): 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977 VW Super Beetle: 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979 VW Bus (Type 2): 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 VW Karmann Ghia: 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974 VW Thing: 1973, 1974 VW Type 3: 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973 Product Highlights & Features Increased Displacement: Moves your engine from 1584cc to 1641cc for improved hill-climbing and highway cruising. Cast Iron Cylinders: Provides a stable, long-wearing surface for the piston rings and excellent thermal stability. Direct 69mm Stroke Fitment: Engineered specifically for the standard 69mm crankshaft stroke. Technical Specifications Part Number: 311-198-06987T (AA-8700T1) Bore Size: 87mm Engine Displacement: 1641cc Piston Material: Hypereutectic Aluminum Alloy Cylinder Material: Cast Iron Installation & Maintenance Tips Check Deck Height: Even with slip-in kits, you must measure your Deck Height (the distance from the top of the piston to the top of the cylinder) to ensure your compression ratio is safe for the fuel you intend to use. Ring End Gap: Always "file-fit" or at least verify the Piston Ring End Gap before installation. Never assume rings are pre-gapped out of the box. Break-In Procedure: Use a high-zinc break-in oil and follow a strict break-in heat cycle to ensure the rings seat properly against the new cast-iron cylinder walls. 31119806987T VW8700T1
