Wiseco K591M875AP Forged Piston Kit Nissan RB26DETT 87.5mm Bore Turbo Dome +14cc

The Wiseco K591M875AP is a Sport Compact forged piston kit engineered specifically for the Nissan RB26DETT inline-six engine. Featuring a turbo dome crown with +14cc volume and an 87.5mm bore (1.5mm overbore), this kit is designed to deliver reliable performance in high-boost forced induction builds with an 8.4:1 compression ratio.

Key Features:

• Forged from dedicated in-house forgings for a lightweight yet superior-strength piston optimized for the final shape
• ArmorGlide® anti-friction skirt coating minimizes scuffing during break-in, reduces friction on cylinder walls, and quiets operation
• Textured piston crown improves combustion characteristics
• Specially designed valve pockets and complex turbo dome crown geometry engineered for multivalve applications
• Steel nitride/Napier XX ring package included — plasma moly 1.0mm, 1.2mm, and 2.8mm pre-gapped rings for excellent seal and friction reduction
• Forced pin oiling for improved lubrication under high load
• Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility

Specifications:

• Bore: 87.5mm (3.445 in) | Oversize: +1.5mm (0.060 in)
• Stroke: 73.68mm (2.901 in)
• Rod Length: 121.5mm (4.783 in)
• Compression Height: 30mm (1.181 in)
• Block Height: 188.5mm (7.421 in)
• Pin Diameter: 21mm (0.827 in) — Pin Part #: S624
• Dome Volume: +14cc
• Compression Ratio: 8.4:1
• Piston Weight: 360g (per piston)

Included in Kit:

• 6x Forged pistons with ArmorGlide® coating
• Piston pins (Part #: S624)
• Ring set (Part #: 8750XX)
• Wrist pin locks

The Wiseco K591M875AP piston kit is an ideal choice for RB26DETT builds targeting high horsepower output under forced induction, providing the strength, durability, and precision machining demanded by serious engine builders and racers.