Wiseco Mitsubishi EVO X 4B11 Turbo -8cc 86.50mm Bore 8.8 CR HD Forged Piston Kit

If you're rebuilding the heart of your Mitsubishi EVO X with the 4B11 turbo engine, especially for serious racing or heavy-duty performance, a strong set of forged pistons is where you start. This kit from Wiseco is designed to handle the extreme demands of competition builds, offering a significant upgrade over stock cast pistons. They're made to take a beating and keep performing when you push your engine to its limits.

These pistons are forged from 2618 aluminum right here in the USA, which gives them improved tensile strength compared to other materials. Wiseco machines them with precision ring grooves, anti-detonation grooves, and other features to ensure a solid seal and prevent detonation. They also come with an ArmorGlide skirt coating that helps reduce friction, resist seizure, and even quiet things down a bit. The fully machined crown and forced pin oiling are details that show these are built for the long haul in tough conditions.

This set is for a standard 86.50mm bore and features a compression ratio of 8.8:1, making them a solid choice for many turbo builds. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. You'll want to refer to the manufacturer's installation instructions for specific details on fitting these into your 4B11 engine.