Wiseco K640M88 Forged Dish Pistons for 2007-13 MazdaSpeed 3 / 06-07 MazdaSpeed 6

Vehicle Fitment

• 2007-2013 Mazda MazdaSpeed 3 (Turbo, 2.3 L MZR DISI)
• 2006-2007 Mazda MazdaSpeed 6 (Turbo, 2.3 L MZR DISI)
• Ford / Cosworth / Lotus 2.3 L Duratec DISI Turbo (selected applications)

Features

• Forged 2618 aluminum alloy for high strength and durability
• ArmorGlide® coated skirts reduce friction and piston noise
• Dished crown (-13.3 cc) for optimized compression under boost
• Offset 22.5 mm wrist pins for improved balance and sealing
• Precision machined ring grooves for high-performance sealing
• Enhanced lubrication channels for wrist pins and skirts
• Lightweight design (~346-348 g per piston) for responsive performance
• Engineered for turbocharged DISI engines and high-boost applications

Specifications

• Bore: 88.00 mm / 3.464 in
• Stroke: 94 mm / 3.701 in
• Compression Height: 32.25 mm / 1.27 in
• Deck Clearance: ~1.0 mm / 0.040 in
• Dome / Dish Volume: -13.3 cc
• Compression Ratio: ~9.5:1 to 9.9:1 depending on engine setup
• Wrist Pin Diameter: 22.5 mm / 0.886 in
• Piston Weight: ~346-348 g
• Ring Set: 8800XX steel

Included Components

• 4x Forged pistons
• 4x Wrist pins
• 4x Retaining clips
• 1x Ring set (8800XX)

Product Description

The Wiseco K640M88 piston kit is designed for high-performance 2.3 L MZR DISI turbo engines in MazdaSpeed 3 and MazdaSpeed 6 models. These forged pistons offer superior strength and durability, with ArmorGlide® coated skirts to reduce friction and noise under demanding conditions. The dished crown design maintains a moderate compression ratio, ideal for boosted applications.

Offset wrist pins and precise skirt geometry ensure balanced operation, improved sealing, and efficient lubrication during high-RPM performance. The lightweight construction (~346-348 g per piston) helps reduce engine vibrations and enhances throttle response.

Installation requires checking deck height and piston-to-wall clearances. Oil squirters may need minor adjustment to prevent interference with the piston skirts. This kit is perfect for performance rebuilds, high-boost street builds, and motorsport applications requiring reliability and strength.