Wiseco Mitsubishi 4G63 7-Bolt 1.9cc Dome 10.5:1 Compression Piston Set

Wiseco is well-known for making strong, reliable internal engine components, especially for performance applications. This Professional Series piston set is built for serious racers and builders who need parts that can handle extreme conditions. These pistons are forged and machined in the USA from 2618 aluminum, which gives them improved tensile strength to stand up to the demands of heavy to severe duty race builds.

Each piston features a 1.9cc dome and is designed to achieve a 10.5:1 compression ratio, a popular choice for many 4G63 7-bolt builds looking for improved power without sacrificing too much drivability. You'll find precision ring grooves, an anti-detonation groove, and other features to improve ring seal. They also come with an ArmorGlide skirt coating that helps reduce friction, resist seizure, and operate more quietly. The fully machined crown and forced pin oiling further contribute to their durability and performance under stress.

This set includes four pistons, each with an 87.00 mm bore and a 28.70 mm compression height, using a 0.866 in. pin diameter. Please note that these pistons are not CARB approved and cannot be shipped to California. They are designed for sport compact applications.