Wiseco Mitsu 4G64 w/4G63 Heads 10.5:1 E85 Piston Shelf Stock Kit

Forged from 2618 aluminum right here in the USA, these Wiseco pistons are built for serious performance in your Mitsubishi 4G64 engine when using 4G63 heads. They're designed with a 10.5:1 compression ratio, making them a solid choice for E85 fuel builds where you need to handle more power and torque. Wiseco engineers these pistons for heavy-duty and severe race applications, so you know they're made to take a beating and keep performing when you push your engine hard.

You'll find precision ring grooves on these pistons, along with features that improve ring seal and an anti-detonation groove to help prevent damage under high cylinder pressures. They also come with an ArmorGlide skirt coating. This isn't just for looks; it helps reduce friction for smoother operation, resists seizure if things get hot, and contributes to quieter running. The fully machined crown ensures accuracy, and the forced pin oiling system keeps the wrist pins well-lubricated, which is crucial for longevity in high-stress builds.

This is a shelf stock kit, meaning it's designed to fit specific applications without extensive custom machining, though always consult the manufacturer's instructions for your specific build. This set includes four pistons, each with an 86.00 mm bore and a 35.00 mm compression height, using a 0.8661 inch pin diameter. Please note that these pistons are not CARB approved and cannot be shipped to California.