R53 R52 W11 Sneed Forged Street Series Piston Set — Plus Size 77.50 mm
The R53 R52 W11 Sneed Forged Street Series Piston Set — Plus Size 77.50 mm is a high-strength internal engine upgrade engineered by SneedSpeed for first-generation MINI Cooper S (R53) and R52 MINI Cooper S models equipped with the W11 supercharged 1.6 L engine. This set features forged 2618-alloy pistons sized to 77.50 mm bore diameter, making it ideal for engines that have been bored oversize during rebuild or machining and are destined for enhanced performance and durability. (sneedspeed.net)
Designed for Strength & Heat Resistance
These pistons are built to handle elevated thermal and mechanical loads associated with spirited street driving, higher RPM operation, and supercharged applications. The forged 2618 alloy construction provides improved structural stability over OEM cast pistons, helping maintain combustion sealing and piston integrity when the engine is rebuilt to oversize dimensions.
Key Features
-
Forged 2618 Alloy Construction: High-strength aluminum alloy pistons for enhanced fatigue, heat, and load resistance — especially beneficial in boosted or tuned street engines. (sneedspeed.net)
-
Plus Size 77.50 mm Bore: Precision machining and sizing to fit engines that have been bored to 77.50 mm, allowing correct cylinder wall clearance and sealing without additional machining. (sneedspeed.net)
-
Optimized Dome Design: Piston crown geometry designed for strong combustion dynamics and reduced detonation risk. (sneedspeed.net)
-
Performance-Oriented Skirt Coating: Reduces friction between piston skirt and cylinder wall, promoting smoother operation and reduced wear. (sneedspeed.net)
-
Balanced and Weight-Matched: Precision balancing across all pistons to support smooth, high-RPM operation without unwanted vibration. (sneedspeed.net)
-
High-Quality Wrist Pins Included: Robust wrist pins are engineered to handle increased load and reduce wear in performance conditions.(sneedspeed.net)
-
OEM & Aftermarket Rod Compatibility: Designed to work with stock connecting rods as well as a wide range of performance rod options. (sneedspeed.net)
Benefits
-
Greater Durability: Forged alloy pistons resist cracking and fatigue under street and enthusiast driving conditions. (sneedspeed.net)
-
Thermal Stability: Better performance under elevated heat loads compared with stock cast pistons. (sneedspeed.net)
-
Smooth Operation: Precision design and skirt coating help reduce parasitic friction and promote efficient motion. (sneedspeed.net)
-
Direct Fit for Oversize Bores: Correctly sized to fit re-bored 77.50 mm cylinders with proper clearances, ensuring reliable performance without complex modifications. (sneedspeed.net)
Application
This piston set is engineered specifically for:
-
R53 AND R52 MINI Cooper S models using the W11 1.6 L supercharged engine
-
Engines that have been machined to 77.50 mm bore
-
Street and mild performance builds where forged strength and heat resistance are desired
