Wiseco Mitsu Evo 4-9 4G63 Asymmetric Skirt Bore 85.50mm - Size +.020 - CR 9.5 - Single Piston

This listing is for a single Wiseco forged piston designed for Mitsubishi 4G63 engines found in Evo 4-9 models. It features an 85.50mm bore and is sized at +.020, with a compression ratio of 9.5:1. These pistons are built from 2618 aluminum, forged and machined in the USA for improved tensile strength, making them suitable for heavy to severe duty race builds.

The piston includes precision ring grooves, an anti-detonation groove, and features designed for improved ring seal. It also comes with an ArmorGlide skirt coating that helps resist seizure, reduces friction, and contributes to quieter operation. The fully machined crown and forced pin oiling are additional details that show these are well-made components for demanding applications.

Because these are sold individually, you'll need to order the correct quantity for your engine build. Please note that this part is not CARB approved and cannot be shipped to California.