Wiseco K556M86 Forged Piston Kit for 1989-2002 Nissan SR20DE / SR20DET

Vehicle Fitment

• Nissan SR20DE (2.0 L, 16-valve, naturally aspirated)
• Nissan SR20DET (2.0 L, 16-valve, turbo) - common in S13, S14, S15, 180SX / 200SX from ~1989-2002

Features

• Forged from 2618-grade aluminum for high strength under load
• ArmorGlide® skirt coating to reduce friction and noise
• -12.0 cc dished crown to optimize compression for tuned or boosted builds
• Precision-machined ring grooves with anti-detonation groove for reliable sealing
• Forced pin oiling to ensure proper lubrication of the 22 mm wrist pin
• Fully machined crown ensures consistent combustion performance
• High-performance 8600XX ring set included
• Designed for high-RPM, racing, or severe-duty performance use

Specifications

• Bore: 86.00 mm
• Stroke: 86.00 mm
• Compression Height: 32.00 mm
• Piston Dish Volume: -12.00 cc
• Estimated Compression Ratio: ~9.1:1-9.25:1
• Wrist Pin Diameter: 22 mm
• Material: Forged 2618 aluminum
• Piston Set Quantity: 4
• Ring Set: 8600XX (1.0 / 1.2 / 2.8 mm)
• Approximate Piston Weight: ~328 g

Included Components

• 4x forged pistons
• 4x 22 mm wrist pins
• 4x 8600XX piston ring sets
• 4x circlips / locking rings

Product Description

The Wiseco K556M86 piston kit is a high-performance, professional-series forged set made for Nissan's SR20 engine family - compatible with both the SR20DE (naturally aspirated) and SR20DET (turbo) versions. Built from 2618 aluminum, these pistons are engineered to withstand aggressive tuning, high RPM, and severe-duty use.

A -12 cc dished crown helps lower compression, offering improved detonation resistance for boosted or high-performance applications. The ArmorGlide® coating on the skirts reduces friction, while forced pin oiling ensures reliable lubrication of the 22 mm wrist pins under load. Precision ring grooves and an anti-detonation design provide strong ring sealing and durability.

This complete four-piston kit includes premium 8600XX rings, wrist pins, and locking clips - giving you everything needed for a robust SR20 rebuild or upgrade. Suitable for race builds, drift cars, or high-stress street motors, the K556M86 delivers strength, reliability, and performance.