Wiseco K675M865AP Mitsubishi Forged Piston Kit Bore Compression - 4G63 7-Bolt 86.5mm 4cc 9.5 1

The Wiseco K675M865AP is a Professional Series forged piston kit engineered for the Mitsubishi 4G63 2.0L DOHC 7-bolt engine. Designed to a stock-rebuild-friendly 9.5:1 compression ratio with a -4cc dish, this kit is an ideal choice for turbocharged builds targeting a reliable, street-capable compression level. The 86.5mm bore (+1.5mm over stock) suits bored or sleeved blocks and pairs with the standard 88mm stroke and 156mm long connecting rod.

Key Features:

• 86.5mm bore (+1.5mm / +0.060" over stock)
• 9.5:1 compression ratio with -4cc dish crown — ideal for boosted, stock-stroke builds
• 28.70mm compression height — designed for use with 156mm long rods
• 22mm wrist pin diameter
• Forged and machined from 2618 aluminum alloy in the USA for superior tensile strength under high heat and boost
• ArmorGlide® skirt coating for reduced friction, quieter operation, and seizure resistance
• Armor Plating crown coating — increases aluminum hardness, prevents ring micro-welding, reduces carbon buildup, and resists detonation damage
• Precision-machined ring grooves with anti-detonation groove and optimized accumulator volumes for maximum ring seal
• Valve pocket design allows use of oversized valves and high-lift camshafts
• Complex skirt profile promotes bore stability and optimum ring seal while minimizing friction
• Kit includes 4 pistons, rings, wrist pins, and clips

The K675M865AP is part of Wiseco's Professional Series Sport Compact lineup, purpose-built for the Mitsubishi DSM and Evo 1–3 platform. Whether used in a stock-displacement rebuild or a high-boost street/track application, these pistons deliver the precision, durability, and performance that Wiseco is known for.