Wiseco Mitsubishi 4G63 85.50 mm Bore 28.70 mm CH -12.00 CC Piston Set

The Wiseco Professional Series Forged Piston Set (K674M855) is designed for Mitsubishi 4G63 2.0L engines, specifically for applications utilizing a 156mm long rod in Generation 2 / 93-01 (7-bolt) configurations. These pistons feature an 85.50mm bore, 28.70mm compression height, and a -12.00cc dish, resulting in an 8.5:1 compression ratio when paired with an 88mm stroke and 156mm rod length.

Each piston is engineered, forged, and machined in the USA from premium 2618 aluminum alloy, providing superior tensile strength to withstand the rigors of high-performance and racing environments. A key feature is the ArmorGlide® skirt coating, which offers enhanced seizure resistance, reduced friction, and quieter operation. The fully machined crown incorporates precision ring grooves, an anti-detonation groove, and other features to improve ring seal. Forced pin oiling is also integrated for increased lubrication and durability.

This set includes four pistons and is ideal for serious racers and builders seeking custom-level performance and durability. Installation requires specialized tools for engine disassembly and reassembly, and it's recommended to work with an experienced engine builder to ensure proper clearances and tolerances are met. Factory connecting rods and crankshaft may need to be inspected or replaced depending on the intended power goals. These pistons are specifically designed for the 7-bolt 4G63 engine, and while commonly found in DSM platforms like the Mitsubishi Eclipse and Eagle Talon, it's crucial to verify your engine's exact specifications (e.g., rod length, crank stroke) to ensure compatibility. The total product weight is approximately 8.4 lbs.