Wiseco Pistons 1400HD 4G64 with 4G63 Head (21mm Pin 6-Bolt DSM) Compression Ratio | Bore Size:9.8:1 | 87.00mm (.020" Overbore) If you are like most

If you are like most Evo owners

water is never efficiently processed or flowed between the block and head to provide for maximum heat dissipation in the combustion chamber

The -10AN Front Fitting removes the PCV Valve and re-uses the factory O-ring

The pistons come standard with  ArmorGlide® coating material for reduced friction and noise

Wiseco Pistons 1400HD 4G64 with 4G63 Head (21mm Pin 6-Bolt DSM) Compression Ratio | Bore Size:9.8:1 | 87.00mm (.020" Overbore) If you are like mostFits 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 Description: 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