CP Piston & Ring Set for Mitsubishi 4G64/4G63 2G - Bore (87.0mm)-Size (+0.5mm)-Stroke (100)-Set of 4

This set includes four forged pistons and their corresponding ring sets, specifically made for Mitsubishi 4G64 and 4G63 2nd Generation engines. These pistons are designed to be 0.5mm over the standard bore size, measuring 87.0mm, and are built for a 100mm stroke. If you're rebuilding the top end of your Mitsubishi engine, especially if you're looking to increase displacement or handle more power, these forged pistons are a solid choice.

Forged pistons are significantly stronger than cast pistons because they're made from a solid block of aluminum alloy that's heated and hammered into shape. This process aligns the grain structure of the metal, making them much more resistant to deformation under high pressure and temperature. This is crucial for performance applications where cylinder pressures can spike dramatically. The 87.0mm bore size with a +0.5mm over specification means these are intended to replace worn cylinders or to achieve a slightly larger displacement when paired with a 100mm stroke crankshaft. The included ring sets are designed to seal against the cylinder walls, ensuring proper compression and oil control.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Proper ring gap setting and piston-to-wall clearance are critical for engine longevity and performance, especially with forged components. This set is a significant upgrade for anyone looking to build a more robust and powerful engine from their Mitsubishi 4G64 or 4G63 platform.