CP Piston & Ring Honda B-Series - Bore (81.5mm) - Size (+0.5mm) - CR (10.5) (Single Piston)

CP Pistons is known for making strong, well-built internal engine components, and this forged piston for Honda B-Series engines is no exception. If you're rebuilding or modifying your B-series engine, this piston is designed to handle increased stress and performance demands. It features a bore size of 81.5mm and is 0.5mm oversize, meaning it's intended for a block that has been bored out to match. The 10.5:1 compression ratio is a popular choice for a good balance between power and pump gas drivability.

This piston is forged from high-strength aluminum, a common material for performance pistons because it's lightweight yet durable. The forged process creates a denser, more uniform grain structure compared to cast pistons, making it more resistant to detonation and fatigue under high cylinder pressures. This particular piston is sold individually, so you'll need to order one for each cylinder in your B-series engine. Remember that this part is not CARB approved and cannot be shipped to California.