Wiseco K618M775 Forged Piston Kit for 2002-2006 Mini Cooper S 1.6L (Tritec)

Vehicle Fitment

• 2002-2006 Mini Cooper S (1.6 L Tritec / W11 / T16B4, 16-valve, supercharged)

Features

• Forged 2618 aluminum for high strength and durability
• ArmorGlide® low-friction skirt coating to minimize wear
• Flat-top piston crown (0 cc) for stable compression
• Strutted forging design to improve piston rigidity
• Precision ring groove machining for superior sealing
• Floating / press-fit ~21 mm wrist pin
• Designed for high-performance and forced-induction operation
• Includes a performance-grade ring set (7750XX)

Specifications

• Bore: 77.50 mm
• Stroke: 85.80 mm
• Compression Height: 26.50 mm
• Piston Dish / Crown: 0 cc (flat-top)
• Compression Ratio: ~8.5 : 1
• Wrist Pin Diameter: 21.00 mm
• Piston Material: Forged 2618 aluminum
• Block Height: 210 mm
• Nominal Piston Weight: ~250 g

Included Components

• 4x forged pistons
• 4x 21 mm wrist pins
• 1x ring set (7750XX)
• Circlips / retaining locks for wrist pins
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Product Description

The Wiseco K618M775 piston kit is tailored for the 1.6 L Tritec engine found in the Mini Cooper S (2002-2006). These pistons are forged from high-strength 2618 aluminum, giving you reliability and durability under performance driving or forced-induction conditions.

With a flat-top crown (0 cc) and a compression ratio of around 8.5:1, these pistons are well-suited for supercharged or high-boost setups. The strutted forging design adds rigidity, and the ArmorGlide® coated skirts reduce friction for smoother operation and better longevity. The precision ring grooves and included 7750XX ring set ensure great sealing characteristics.

This kit is ideal for engine builders looking to upgrade or rebuild their Mini Cooper S with performance in mind. During installation, it's important to verify ring gaps, check clearances, and follow torque specifications to optimize engine performance and longevity.