Supertech Mitsubishi 4G63 85mm Bore -9.5cc Dish 9:1 CR Pistons - Set of 4 (Excl Rings)

This Supertech piston set includes four forged pistons designed for the Mitsubishi 4G63 engine, featuring an 85mm bore, a -9.5cc dish volume, and a 9:1 compression ratio. These pistons are built for performance and durability, making them a strong option for engine rebuilds or upgrades. The dish volume and compression ratio are specifically chosen to work well with common 4G63 cylinder head configurations, aiming for a balanced power output and reliable operation.

Forged from high-strength aluminum alloy, these pistons are significantly more robust than cast pistons, offering better resistance to detonation and the stresses of higher performance applications. The 85mm bore size is standard for many 4G63 builds, and the 9:1 compression ratio provides a good compromise between power and pump gas compatibility. It's important to note that this set does not include piston rings, so you will need to source those separately to complete the installation. Proper ring selection is crucial for sealing and oil control, so consult your engine builder or service manual for recommendations.

When rebuilding your 4G63 engine with these pistons, pay close attention to piston-to-wall clearance and ring gap specifications as recommended by Supertech or your engine builder. These details are critical for ensuring proper engine break-in and long-term reliability. Remember that this part is not CARB approved and cannot be shipped to California.