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Unlock smoother, safer power gains with the ALTA 15% Supercharger Pulley, precision-engineered for supercharged MINI Cooper S and JCW models. Crafted from lightweight 6061-T6 aluminum, this pulley reduces rotational mass, improving throttle response and adding up to 20 WHP.
The Version 2.0 design features a stainless steel clamp-on coupler, oversized belt retainers, and cross-drilled grooves for superior belt grip. Unlike other press-fit pulleys, ALTA's clamp-on hub securely attaches even to worn shafts—up to .020" wear tolerance—making it an ideal solution for damaged or previously modified superchargers.
Balanced for performance at up to 16,000 RPM, this pulley offers high-speed reliability and long-term durability. ALTA pioneered this clamp-on method, and it remains the gold standard for MINI pulley upgrades.
Key Features:
15% Reduction Drive Ratio – Increases supercharger speed for ~20 WHP gain
6061-T6 Billet Aluminum Body – Lightweight, anodized, and naturally balanced
Stainless Steel Clamp-On Coupler – Secure fit on worn or damaged shafts
Cross-Drilled Grooves – Enhances belt grip and reduces slippage
Oversized Belt Retainers – Prevents belt derailment under boost
Balanced to 0.1g @ 16,000 RPM – Better than stock-level balance
Version 2.0 Design – Improved construction and shaft engagement
Install Aperture – Allows visual confirmation of proper fitment
Compatible with ALTA Pulley Removal Tool (AMP-ENG-208)
(Not compatible with JCW or GP pulley removal)
Vehicle Fitment:
2002–2006 MINI Cooper S Hardtop (R53)
2004–2008 MINI Cooper S Cabrio (R52)
2002–2006 MINI Cooper S JCW / GP
Pulley fits, but ALTA pulley puller will not remove OEM JCW/GP pulley.
What’s Included:
(1) ALTA Supercharger Pulley Hub – 303 Stainless Steel
(1) ALTA Supercharger Pulley Body – Black Anodized 6061-T6
(5) Grade 12.9 Bolts & (5) Grade 10.9 Hi-Collar Lock Washers
(1) Allen Wrench
Instructions
ALTA Warranty Info
ALTA Stickers
We are open Monday-Friday from 8am-6pm EST
Yes, customers located in and around the the Piedmont area are welcome to pick up their items from our retail location during normal business hours. Our address is:
Elite Race Fab
1514 Holbrook St Suite D-F
Greensboro, NC 27403
Elite Race Fab offers free ground shipping & handling to our retail customers within the lower 48 contiguous United States on most orders totaling $159.99 and higher, when the item being purchased is not a Freight/LTL item! Orders under $159.99 will be subject to a nominal $13.99 Flat shipping charge. Some exceptions and/or exclusions apply, in those scenarios you will be advised of any additional charges in the item details/description stating shipping exclussions/freight shipping required etc.
In regards to expedited and international shipping each order will need to be quoted on a case by case basis. You can obtain a quote two ways:
- From your shopping cart select "Request a Quote" prior to placing your order. We will review your proposed order and promptly respond with shipping estimates.
- Complete your order ahead of time indicating either expedited or international shipping during the checkout process. We will promptly determine shipping rates for your order and email you for approval and additional payment.
-Give us a call and we can ensure your item is shipped right then, to ensure you have it in time for your deadline.
We have been committed to offering all of our customers the lowest pricing throughout our website day in and day out. We value your business so much that we go a step further than our competitors. We use a third party software that proactively monitors all our competitor's websites/pricing so that we can make adjustments accordingly if needed to have the lowest prices. Thats right, no need to spend hours searching for the lowest prices, as ours will be the lowest.
As far as price matching, we dont want to write a check we cant cash, but we certainly want to earn your business. With that said, we will go above and beyond to match our competitor's pricing when it is needed. Simply email us, click the live contact button, or give us a call and be sure to have a link to our competitor's site and please factor in any shipping and handling their website will be charging. We will then ensure you get the lowest price, and either match or beat their pricing.
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