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

Forged from 2618 aluminum, these Wiseco HD2 pistons are built for the demanding Mitsubishi Evo 4-9 4G63T engine. This set is specifically sized at 85.50mm with a +.020 undersize, featuring a 10.5:1 compression ratio. The asymmetric skirt design and ArmorGlide coating help reduce friction and noise while improving seizure resistance, making them well-suited for heavy-duty race applications.

Wiseco machines these pistons in the USA, incorporating features like gas ports, precision ring grooves, and anti-detonation grooves to enhance ring seal and overall performance. The fully machined crown and forced pin oiling are also included to ensure durability under severe operating conditions. This set is designed for builders who are serious about extracting maximum performance and reliability from their 4G63T engine.

This piston set is intended for serious racing builds and is not CARB approved, meaning it cannot be shipped to California. Ensure you consult with your engine builder or refer to Wiseco's installation guidelines for proper fitment and assembly procedures.