Wiseco Pistons K667M8525AP Forged Piston Set 85.25mm Bore 4G63 4-Cylinder

The Wiseco K667M8525AP is a high-performance forged piston set engineered for serious engine builders and performance enthusiasts. This complete 4-piston kit features Wiseco's advanced HD2 asymmetric skirt design, delivering superior strength, reduced friction, and improved durability in demanding applications.

Key Specifications:

• Bore: 3.356 inches (85.25mm)
• Compression Height: 1.137 inches (28.875mm)
• Dish Volume: -17.3cc
• Compression Ratio: 8.4:1
• Wrist Pin Diameter: 22mm
• Designed for 3.465 inch (88mm) stroke
• Compatible with 6.142 inch (156mm) connecting rods

Premium Construction:

• Forged from high-silicon, low-expansion aluminum alloy for maximum strength
• HD2 asymmetric skirt design reduces friction and piston rock
• Diamond-turned finish from CNC machining ensures perfect size consistency
• Improved heat transfer properties for better thermal management
• Race-proven design used by professional engine builders worldwide

Wiseco pistons are manufactured in-house at their 150,000 square-foot facility using state-of-the-art forging and CNC machining equipment. Each piston undergoes rigorous quality testing to ensure it meets the demanding standards of both racers and performance enthusiasts. This set includes 4 pistons with rings, wrist pins, and circlips for a complete installation.