Wiseco 6678M865AP Sport Compact Forged Piston Kit Toyota 2JZ 86.5mm 10.5:1 CR

The Wiseco 6678M865AP is a high-performance forged piston kit engineered for Toyota 2JZ engines, featuring an 86.5mm bore size (0.5mm oversize) and a 10.5:1 compression ratio. This Sport Compact series piston kit represents decades of Wiseco's racing experience from Formula 1, Indy Car Racing, NHRA, and AMA competition.

Key Features:

• Forged from high-grade aluminum alloy for superior strength and durability
• 86.5mm (3.405 inch) bore size with 0.8cc dome configuration
• 10.59:1 compression ratio optimized for performance
• ArmorGlide skirt coating reduces friction and wear while freeing up horsepower
• Includes upgraded .200 inch wall tool steel wrist pins (S734 - 22mm)
• Complete with piston rings (8650XX series)
• Asymmetric skirt profile for reduced friction and optimal ring seal
• Precision valve pockets designed for maximum flow and clearance
• Crown shapes engineered to promote intake charge efficiency
• Optimized squish and quench design resists detonation and pre-ignition

Each kit includes six pistons with rings and pins. Compression height measures 1.338 inches (33.98mm) with specifications for 5.590 inch rod length and 3.386 inch stroke. Always verify piston-to-valve clearance and maintain at least .030 inch piston-to-head clearance including gasket thickness during installation.