SneedSpeed R53/R52 MINI S & JCW Supercharger
Street · Sport Performance Upgrade
The SneedSpeed R53/R52 MINI S & JCW Supercharger is a fully rebuilt, performance-oriented supercharger assembly engineered for first-generation MINI Cooper S and John Cooper Works (R52/R53) models equipped with the supercharged W11 engine. Available in Street Series and Sport Series variants, this supercharger brings renewed life and increased performance potential to your R53/R52 engine by replacing worn or restrictive factory units with a high-quality direct-fit solution.
Overview & Purpose
Whether you’re restoring drivability or increasing power output, this supercharger assembly delivers improved airflow and mechanical reliability. Each unit is fully rebuilt with precision components including new bearings, seals, PTO gears, and coated rotors — providing a dependable upgrade over worn or original equipment.
This supercharger is designed to:
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Reinstate smooth throttle response
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Improve everyday power delivery
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Support tuned engine performance
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Replace failing stock units without modification
It bolts directly to the factory mounting points and works with stock fuel and ignition systems as supplied.
Configuration Differences
Street Series — Factory-Level Rebuild
The Street Series supercharger restores OEM performance characteristics with all core components remanufactured to high standards. This variant is ideal for vehicles where reliability and smooth operation are priorities.
Key Attributes
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OEM-geometry inlet and outlet
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New gaskets, seals, bearings, and PTO gears
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Recoated rotors and case
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Direct replacement for worn or failed stock units
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Compatible with factory calibration and drivability
Performance Outcome
Delivers restored power and throttle response comparable to original output, with improved mechanical reliability over aged stock units.
Sport Series — Enhanced Airflow & Slightly Higher Output
The Sport Series supercharger retains all the mechanical refreshment features of the Street variant but adds performance-focused airflow enhancements.
Key Attributes
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CNC-ported inlet and outlet for smoother flow
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Enhanced low-friction rotor coating
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Increased volumetric efficiency over OEM shape
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Designed for improved power delivery with supporting mods
Performance Outcome
Higher airflow efficiency typically yields modest gains in boost and torque responsiveness compared with the Street Series, making it well suited to tuned or enthusiast-driven engines.
Benefits by Configuration
| Feature | Street Series | Sport Series |
|---|---|---|
| Rebuilt Core | Yes | Yes |
| New Seals & Bearings | Yes | Yes |
| Rotor Coating | Standard | Enhanced Low-Friction |
| Porting | OEM Geometry | CNC Ported Inlet/Outlet |
| Throttle Response | Factory-like | Sharper with Supporting Mods |
| Ideal For | OEM restoration | Street performance builds |
| Tune Requirement | No | Recommended with supporting mods |
Applications
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R52/R53 MINI Cooper S
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R52/R53 MINI John Cooper Works
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Daily drivers with worn superchargers
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Enthusiasts seeking improved airflow and response
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Engines with supporting intake, exhaust, or tuning upgrades
Short Product Summary
SneedSpeed R53/R52 MINI S & JCW Supercharger — fully rebuilt direct-fit supercharger assembly available in Street Series and Sport Series configurations for R53/R52 supercharged MINI Cooper S and JCW models, providing restored reliability and enhanced performance potential.
