Wiseco K556M865 -12cc Forged Piston Set (86.50 mm) for Nissan SR20 (,AosqrtNsqrtJPY 91-,A

Vehicle Fitment

• 1991-2002 Nissan with SR20DE or SR20DET 2.0L 16V engine (SR-series)

Features

• Forged 2618 aluminum construction for high tensile strength
• ArmorGlide® skirt coating for reduced friction and seizure resistance
• Flat-top design with -12 cc dish for lower compression - ideal for turbo or high-boost
• Precision ring grooves and an anti-detonation groove for reliable sealing
• Forced-pin oiling for better lubrication and durability under load
• Fully machined piston crowns for consistent performance
• Supplied as a complete rebuild kit including rings, pins, and locks
• Designed for severe-duty, high-performance applications

Specifications

• Bore Diameter: **86.50 mm**
• Compression Height: **32.00 mm**
• Piston Dish Volume: **-12.00 cc**
• Wrist Pin Diameter: **0.8661 in (≈22 mm)**
• Material: Forged 2618 aluminum
• Ring Set: Included (8650XX series)
• Skirt Coating: ArmorGlide®
• Recommended for SR20 turbo or NA builds seeking lower compression

Included Components

• 4x forged pistons
• 4x wrist pins
• 4x circlip locks
• 4x full ring sets (top, second, oil)
• Specification / installation guide

Product Description

The Wiseco K556M865 piston set is purpose-built for the Nissan SR-series 2.0L engine, covering both naturally aspirated (SR20DE) and turbocharged (SR20DET) variants. It comes with a large 86.50 mm bore and a low compression design (-12 cc piston dish), making it especially suitable for high-boost or performance-tuned SR builds.

Crafted from durable, forged 2618 aluminum, these pistons combine strength and reliability under demanding conditions. The ArmorGlide® skirt coating helps reduce wear and friction, while the forced-pin oiling system ensures enhanced lubrication, even at high RPM or load.

Each set includes everything you need for a full rebuild - pistons, rings, pins, and locks - giving you a turnkey solution for performance engine builds. Designed for serious tuners and racers, the K556M865 offers a strong foundation for power and reliability in SR20 applications.