R53 R52 W11 Sneed Forged Street Series Piston Set — Standard 77 mm
The R53 R52 W11 Sneed Forged Street Series Piston Set — Standard 77 mm is a high-strength internal engine upgrade engineered by SneedSpeed for the first-generation MINI Cooper S (R53), R52 MINI Cooper S, and W11 supercharged engines. These pistons replace worn or stock pistons with forged 2618-alloy construction for enhanced strength, durability, and performance in street and mild performance applications.
Designed for Real-World Performance
These pistons are built to handle the extra thermal and mechanical loads associated with spirited driving, elevated RPM, and forced induction (supercharged or turbocharged) conditions. Their material and design improvements help maintain engine integrity where stock pistons may struggle, ensuring reliable sealing and structural stability under load.
Key Features
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Forged 2618 Alloy Construction: High-strength aluminum alloy pistons designed to resist cracking and fatigue under high loads and elevated temperatures — ideal for higher output street engines.
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Standard 77 mm Bore: Direct replacement for factory pistons in standard bore size, providing seamless fitment without machining.
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Optimized Dome Design: Enhances combustion efficiency through improved chamber shape and reduced detonation tendency.
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Performance-Oriented Skirt Coating: Reduces friction between piston skirts and cylinder walls for smoother operation and reduced wear.
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Balanced and Weight-Matched: Precision balancing ensures consistent weight distribution across all pistons for smooth high-RPM operation.
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High-Quality Wrist Pins Included: Robust wrist pins increase load capacity and reduce wear in demanding conditions.
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OEM & Aftermarket Rod Compatibility: Designed to work with stock and performance connecting rods.
Benefits
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Strength & Durability: Forged material and construction offer greater resistance to mechanical stress than cast pistons, enhancing reliability under high engine loads.
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Improved Combustion Efficiency: The optimized piston crown design supports stronger, more efficient combustion events.
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Reduced Friction: Coated skirts and precise machining reduce internal friction and heat generation.
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Direct Fitment: Standard 77 mm size matches the factory bore, allowing straightforward installation without cylinder re-machining.
Application
This piston set is engineered specifically for:
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R53/MINI Cooper S 2002–2006
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R52/MINI Cooper S models with W11 supercharged engines
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Engines requiring a standard 77 mm bore replacement
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Street-to-mild performance builds where increased reliability and thermal stability matter
