Wiseco Pistons 4G64 with 4G63 Head (21mm Pin 6-Bolt DSM) ASNU a steady flow of oil

a steady flow of oil to the rocker is highly recommended for obvious reasons

and support substantial boost pressure and horsepower

The rear PCV hole is a different size on the USDM and JDM valve covers

We recommend the ThreeBond Gasket Maker

Wiseco Pistons 4G64 with 4G63 Head (21mm Pin 6-Bolt DSM) ASNU a steady flow of oilFits these Applications: Mitsubishi 4G64 with 4G63 Head (21mm Pin 6 Bolt DSM) 100mm Stroke for 150mm Rods 6 Bolt DSM (1988 1992. 5 Eclipse, Talon & Laser Turbo) Includes: (4) Pistons (4) Pins (8) Wire Locks (4) Set of Piston Rings World renowned for our work building race winning pistons, Wiseco utilizes experience from a diverse background of the most sophisticated engines in such venues as Formula 1, Indy Racing League (IRL), NHRA Pro Stock, Moto