CP Piston & Ring Set for Honda B-Series - Bore (84.5mm) - Size (+0.5mm) - Compression Ratio (12.8)

This set includes four forged pistons and their corresponding ring sets, ready for your Honda B-Series engine build. These pistons are designed for an 84.5mm bore and are 0.5mm oversize, intended for engines that have been bored out to accommodate them. With a compression ratio of 12.8:1, they are built for performance applications where increased power output is the goal.

CP Pistons are well-known for their robust construction, and these forged units are no exception. Forging is a process that shapes metal under extreme pressure, creating a stronger, more durable piston than cast alternatives. This makes them ideal for high-performance engines that experience higher cylinder pressures and temperatures. The included ring sets are crucial for sealing the combustion chamber, controlling oil, and transferring heat to the cylinder walls. Proper ring seal is vital for both power and engine longevity, especially with a higher compression ratio like this.

When installing these pistons, ensure your engine block has been professionally bored and honed to the exact 84.5mm specification, and that the cylinder walls are clean and ready for the new rings. It's also important to check the manufacturer's specific clearance recommendations for your B-Series application to ensure optimal performance and durability. Remember, these pistons are not CARB approved and cannot be shipped to California.