Wiseco 2008+ Mitsubishi 4B11 EVO X 86.50mm Bore 0.02 Oversize 86mm Strk 3.5cc Vol 10.5:1 - Set of 4

Wiseco is well-known for making strong internal engine components, especially for performance applications. This set of four forged pistons is built for the 2008 and newer Mitsubishi 4B11 engine found in the Evolution X. These aren't your average pistons; they're designed for serious builders who push their engines hard, offering a significant upgrade over stock components for heavy to severe duty race builds.

Crafted from 2618 aluminum in the USA, these pistons have improved tensile strength, which is crucial for handling the high pressures and temperatures of a performance engine. They feature precision ring grooves, an anti-detonation groove, and other features to improve ring seal. The crown is fully machined for accuracy, and they include forced pin oiling to keep the wrist pins well-lubricated. A notable feature is the ArmorGlide skirt coating, which helps reduce friction, resist seizure, and quiet down operation, making them well-suited for demanding use.

This set is specifically sized for an 86.50mm bore, which is 0.020 inches oversize from the standard 86mm bore. They have a 33.25mm compression height and a 10.5:1 compression ratio, designed to work with the 86mm stroke of the 4B11 engine. Remember, these pistons are not CARB approved and cannot be shipped to California. They are sold as a set of four.