Wiseco Mitsubishi EVO 4-9 HD2 -86.75mm Bore 1.137in CH - Single Piston

Forged from 2618 aluminum right here in the USA, these Wiseco pistons are built for serious performance in your Mitsubishi EVO 4-9. The 86.75mm bore size is a specific measurement for builders looking to achieve a particular displacement, and the 28.88mm compression height is crucial for setting up your valve timing and piston-to-valve clearance. Wiseco engineers these pistons with features like precision ring grooves and anti-detonation grooves to ensure a solid seal and prevent pre-ignition, which is vital when you're pushing the limits of your engine.

You'll also find an ArmorGlide skirt coating on these pistons. This isn't just for looks; it helps reduce friction between the piston and cylinder wall, leading to quieter operation and improved durability under heavy loads. The fully machined crown and forced pin oiling are further details that show these are well-built components designed to handle severe duty in performance applications. If you're rebuilding the heart of your EVO for racing or high-performance street use, these pistons are a solid option.