R56 N14 Sneed Forged Race Series Piston Set – Plus Size 77.50 mm (+0.50)
The R56 N14 Sneed Forged Race Series Piston Set – Plus Size 77.50 mm (+0.50) is a high-performance forged piston upgrade engineered by SneedSpeed for the R56 MINI Cooper S with the turbocharged N14 engine. These pistons are machined oversize (+0.50) to fit re-bored cylinders and built to endure elevated pressures, heat, and performance demands encountered in tuned and competitive applications.
Engineered for Stronger Performance
This piston set is designed to be a direct replacement for factory pistons after a cylinder overbore to 77.50 mm, providing:
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Improved strength and durability under increased cylinder pressures
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Enhanced combustion performance through optimized geometry
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Better thermal resistance for sustained higher-RPM operation
All attributes make this set well suited for performance-focused street builds and track engines where reliability and responsiveness are critical.
Key Features
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Oversize 77.50 mm Bore (+0.50): Precision machining provides the correct bore size and robust fitment for engines requiring oversized pistons following machining work.
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Forged Aluminum Construction: SneedSpeed forges these pistons from high-strength aluminum alloy for increased durability and resistance to fatigue and high thermal loads.
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Performance-Oriented Design: Optimized crown and skirt contours help support improved combustion efficiency, power delivery, and piston stability at higher engine speeds.
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Coated Skirts: Engineered coatings reduce friction and wear against cylinder walls, improving longevity and reducing parasitic losses.
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Balanced for High RPM: Designed to minimize vibration and maintain stable operation under stress and sustained high-RPM conditions.
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Direct Fit for R56 N14 Engines: Built to install directly in N14 engines that have been machined to the appropriate oversize cylinder bore, simplifying installation and compatibility planning.
Performance Benefits
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Greater Load Handling: The forged design supports higher horsepower and elevated boost levels without premature fatigue or failure.
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Extended Durability: Precision machining and enhanced materials deliver improved resistance to wear under competitive or tuned conditions.
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Optimized Efficiency: Combustion-focused geometry supports stronger power delivery and reduces risk of detriment under aggressive tuning.
Ideal Applications
This piston set is best suited for:
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Rebuilt or overbored R56 N14 engines
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High-boost or aggressively tuned street performance engines
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Track and competition builds in need of reliable top-end strength
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Engine projects where reliability and power support are primary goals
