Wiseco Mitsu Evo 4-9 HD2 Asymmetric Skirt Gas Ported Bore 86.50mm - Size +.060 -CR 10.5:1 Piston Set

If you're rebuilding the engine for your Mitsubishi Evo 4-9 and pushing it hard, you need pistons that can handle the stress. This set of Wiseco HD2 pistons is built specifically for those severe duty race applications where reliability is just as important as power. They're designed to work with the 4G63T engine, featuring a 86.50mm bore and a 10.5:1 compression ratio, which is a popular choice for many performance builds.

Wiseco forges these pistons from 2618 aluminum right here in the USA, giving them improved tensile strength for high-performance demands. You'll notice the asymmetric skirt design, which helps reduce friction and noise, and it's further enhanced with an ArmorGlide skirt coating. This coating is designed to resist seizure and reduce friction, contributing to quieter operation. The pistons also feature gas ports for improved ring seal, precision machined ring grooves, anti-detonation grooves, and forced pin oiling to ensure they stay well-lubricated under extreme conditions. The fully machined crown means everything is precisely shaped for optimal combustion.

This set includes four pistons, all machined to exact specifications. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a serious engine build, these Wiseco pistons are a solid option to consider.