Wiseco Mitsu Evo 4-9 HD2 Asymmetric Skirt Gas Ported Bore 85.50mm - Size +.020 - CR 10.5 - Single

When you're rebuilding the top end of your Mitsubishi Evo 4-9 for serious racing, a strong set of pistons is crucial. These Wiseco pistons are forged from 2618 aluminum, giving them improved tensile strength for the demands of heavy and severe duty builds. They're designed with an asymmetric skirt and gas ports to help manage combustion pressure and reduce friction.

Wiseco machines these pistons in the USA, ensuring precision in the ring grooves, anti-detonation grooves, and other features that improve ring seal. The crown is also fully machined for a clean combustion chamber. The ArmorGlide skirt coating helps resist seizure, reduces friction, and contributes to quieter operation, which is a nice bonus when you're pushing your engine hard. These pistons also feature forced pin oiling for better lubrication.

This specific piston is 85.50mm in bore size and is +.020 undersize, with a compression ratio of 10.5:1. Keep in mind these are sold individually, so be sure to order the correct quantity for your engine. Please note that this part is not CARB approved and cannot be shipped to California.