Wiseco 6591M865AP Nissan Turbo Forged Piston Dome Bore - 14cc 86.50mm

The Wiseco 6591M865AP is a forged performance piston engineered for turbocharged Nissan engines. Featuring a +14cc dome design, this piston is built to raise compression in forced-induction applications, delivering improved power output and throttle response under boost.

Wiseco manufactures this piston from high-strength 2618 or 4032 aluminum alloy forging — a material widely used in professional motorsport for its superior fatigue resistance and ability to withstand the extreme heat and pressure cycles of turbocharged and high-performance naturally aspirated engines.

Key Specifications:

• Manufacturer Part Number: 6591M865AP
• Bore Diameter: 86.50mm (3.406")
• Compression Height: 1.181"
• Dome Volume: +14cc (positive dome)
• Application: Nissan Turbocharged Engine
• Construction: Forged aluminum alloy

Key Features:

• Forged construction for maximum strength and durability under high-boost conditions
• Positive dome profile engineered to optimize compression ratio in turbo applications
• Precision CNC-machined to exacting tolerances for proper ring seal and long service life
• Compatible with Wiseco rings and wrist pins for a complete piston assembly solution
• Designed for racing and high-performance street use

Wiseco is a trusted name in performance pistons with decades of experience supplying components to professional racing teams and performance enthusiasts worldwide. The 6591M865AP is sold as a single piston; confirm quantity needed for your specific application.