Manley Mitsubishi 4G63/4G63T 86mm Bore 10.0/10.5:1 Comp Ratio -2.5cc Flat Top T/T Piston Set

If you're rebuilding the engine in your Mitsubishi 4G63 or 4G63T, a solid set of pistons is crucial for handling increased power and ensuring long-term reliability. These pistons from Manley Performance are built for serious engine work, whether you're aiming for more horsepower or just want to refresh your powerplant with well-built components.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to withstand high temperatures and pressures common in performance applications. They feature proven cam and barrel skirt profiles designed to generate power efficiently while minimizing wear on your cylinder walls. The ring lands and grooves are machined to strict standards, which helps ensure a good seal for better combustion and more power. These pistons also come with premium chrome moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the piston skirts for optimal performance.

This set is for an 86mm bore and offers a compression ratio of 10.0:1 to 10.5:1, depending on your cylinder head volume. They are flat-top pistons with a -2.5cc valve relief, often referred to as Turbo Tuff (T/T) pistons. Keep in mind these are not CARB approved and cannot be shipped to California. For the best results, always refer to the manufacturer's installation instructions and ensure you have the correct supporting components for your engine build.