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SKU: AMP-ENG-520
ALTA 02-06 Mini Cooper S/JCW & 02-08 S/JCW Convertible R53 Lightened Crank Pulley 2%+
The ALTA Lightened Crank Pulley provides 2% underdrive and cuts rotational mass for 2002-2006 Mini Cooper S JCW R53 hatchback and 2002-2008 Cooper S JCW Convertible R52 models with supercharged W11 engine. It reduces accessory drive drag freeing power to the wheels while sharpening throttle response. This direct replacement delivers quicker revs and better overall engine efficiency.
Key Features
- Weight Reduction: Drops from stock 25.6 oz to 10.2 oz for 15.4 oz savings accelerating engine spool-up and reducing inertia
- 2% Underdrive: Smaller 127mm diameter versus stock 130mm slows alternator AC compressor belt speeds cutting parasitic losses
- Premium Material: CNC machined from 6061-T6 billet aluminum with hard black anodizing for strength and corrosion resistance
- Dynamic Balancing: Precision balanced to eliminate vibration ensuring smooth high-RPM operation
- Direct Fit Design: Bolt-on installation retains stock belt no modifications required maintains timing accuracy
Product Notes
- Enhances supercharger spool and mid-range torque on W11 engines
- Pair with ALTA underdrive accessories for full accessory drive gains
- Packaged securely with protective sleeve for damage-free arrival
Installation Notes
- Professional installation recommended.
- Requires crank pulley holder tool such as MINI OEM or BMW NTK 11 9 220 equivalent
- Torque M20 crank bolt to 130 ft-lbs then additional 90 degree turn use new bolt
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2006 | MINI | Cooper S | R53 Hatchback |
| 2002-2006 | MINI | Cooper S | JCW Kit R53 Hatchback |
| 2002-2008 | MINI | Cooper S | Convertible R52 |
| 2005-2008 | MINI | Cooper S | JCW Convertible R52 |
Why Choose ALTA?
- Engineered and manufactured in the USA with racing-proven designs
- Focuses on high-quality billet components for reliable power gains
- Backed by decades of Mini Cooper tuning expertise
Frequently Asked Questions
-
Q: Will this pulley fit JCW GP or Works models?
A: Yes it fits all supercharged R53 R52 models including JCW kit GP1 GP2 as they share the W11 crank pulley mounting -
Q: What finish and material construction?
A: Machined from 6061-T6 aircraft aluminum with durable hard black anodizing resists wear handles track heat -
Q: What warranty coverage and install difficulty?
A: Lifetime warranty against manufacturing defects moderate install needs crank tool takes 1-2 hours for experienced mechanics
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact 6 x 5 x 3 inch box with foam inserts
- Weight: 0.7 lbs product 1.1 lbs shipping
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