Manley Mitsubishi 4G63/4G63T (6 Bolt) 86mm Bore 9.0:1 CR -8cc Dish Extreme Duty Pistons w/ Rings

If you're building or rebuilding a Mitsubishi 4G63 or 4G63T engine with a 6-bolt crankshaft, these Manley Extreme Duty pistons are a solid choice for serious performance. They're designed for an 86mm bore and feature a -8cc dish to achieve a 9.0:1 compression ratio, making them well-suited for boosted applications where durability is key.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high cylinder pressures and temperatures. The pistons come with tool steel wrist pins for added toughness, and the skirt profiles are carefully shaped to reduce friction and wear on the cylinder walls while still generating power. Manley also pays close attention to the ring lands and grooves, machining them to exacting standards to ensure a good seal with the piston rings, which is crucial for both power and engine longevity. This attention to detail in machining helps ensure the rings seat properly and maintain their seal under demanding conditions.

This set includes the pistons, rings, and wrist pins, making it a comprehensive package for your engine build. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.