Mahle MS Piston Set H22 87.00mm Bore 90.0mm Stroke 143mm Rod 22mm Pin 10cc 11.5 CR Set of 4

If you're rebuilding the engine in your Honda H22, this Mahle MS Piston Set is a solid choice for performance and durability. These are forged pistons, meaning they start as a solid block of aluminum that's heated and hammered into shape. This process makes them much stronger and more resistant to the extreme pressures and temperatures found in a performance engine compared to cast pistons. This set is specifically designed for the H22 engine, featuring an 87.00mm bore and a 11.5:1 compression ratio, which is a notable bump over stock and will give you a good increase in power when paired with appropriate tuning.

Mahle has been in the engine component business for a long time, and these pistons reflect that experience. They're made from 4032 aluminum, a material known for its strength and good thermal expansion properties, which helps prevent piston slap and ensures a good seal. The pistons weigh in at 335g each, keeping rotating mass manageable for good engine response. The specs include a 90.0mm stroke, a 143mm rod length, and a 22mm pin diameter, all critical dimensions for proper fitment and operation within the H22 block. The 9.8cc dish volume contributes to that 11.5 CR.

This set includes four pistons, ready for installation. Keep in mind that these pistons are not CARB approved, so they cannot be shipped to California. For optimal performance and reliability, it's always recommended to consult with a professional engine builder or refer to Mahle's installation guidelines for proper ring gap, bearing clearance, and assembly procedures.