CP Piston & Ring Set for Honda H22 - Bore (89mm) - Size (+2.0mm) - Compression Ratio (9.0)

CP Pistons is well-known for making strong, reliable internal engine components, and this forged piston and ring set for the Honda H22 is a prime example. If you're rebuilding the heart of your H22 engine, especially for performance applications, these pistons are built to handle the demands. They feature an 89mm bore, which is a +2.0mm oversize, meaning they're designed to replace stock pistons that have been worn or honed out to that size. This set is engineered for a 9.0:1 compression ratio, a solid choice for many performance builds that aim for a balance between power and pump gas drivability.

Forged pistons like these are significantly stronger than cast pistons. They start as a solid block of aluminum alloy that's heated and hammered into shape under immense pressure. This process aligns the grain structure of the metal, making them much more resistant to detonation, heat, and the stresses of high-performance engines. The 89mm bore and +2.0mm oversize specification means these are intended for engines that have already been machined to this dimension, often as part of a rebuild or performance upgrade. The 9.0:1 compression ratio is a versatile figure, offering improved torque and power over stock while generally remaining compatible with premium pump gasoline in many setups.

This set includes the pistons and rings needed to get your H22 engine back together. When installing, ensure your cylinder walls are properly honed to match the +2.0mm oversize and the piston skirt clearance specified by CP Pistons. Proper ring gap and installation are critical for sealing and engine longevity. Please note that this part is not CARB approved and cannot be shipped to California.