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Maximize boost and unleash extra low-end torque with the ALTA 17% Supercharger Pulley, a precision-engineered upgrade for supercharged MINI Cooper S, JCW, and GP models. Designed to build boost earlier in the RPM range, this pulley delivers quicker acceleration and up to 1.5 psi more boost at redline, for reliable and responsive power gains.
Made from 6061-T6 billet aluminum, the Version 2.0 pulley weighs just 8.0 oz, reducing rotating mass compared to the 11.5 oz stock unit. Its stainless steel clamp-on coupler offers unmatched shaft grip—even on worn supercharger shafts—and eliminates the common issues with press-fit pulleys.
Cross-drilled grooves and oversized belt retainers ensure superior grip and prevent belt slippage, while the hub and pulley are precision-balanced to within 0.1g at 16,000 RPM, exceeding OEM standards for high-speed reliability.
Key Features:
17% Reduction Drive Ratio – Increases supercharger RPM for earlier boost and more power
6061-T6 Aluminum Body – Lightweight, anodized, and naturally balanced
303 Stainless Steel Clamp-On Hub – Secure fit, even on worn supercharger shafts
Cross-Drilled Grooves – Improved belt grip under boost
Oversized Belt Retainers – Reduces belt jumping and premature wear
Open Aperture Design – Allows visual shaft alignment verification
Precision-Balanced Assembly – Balanced to 0.1g at 16,000 RPM for smooth operation
Compatible with ALTA Pulley Removal Tool (AMP-ENG-208)
(Tool does not fit JCW or GP models for pulley removal)
Vehicle Fitment:
2002–2006 MINI Cooper S Hardtop (R53)
2004–2008 MINI Cooper S Cabrio (R52)
MINI Cooper S JCW & GP*
Pulley fits, but removal requires alternative method (not compatible with AMP-ENG-208 tool)
What’s Included:
(1) ALTA Supercharger Pulley Body – 17% Reduction
(1) ALTA Stainless Steel Pulley Hub
(5) Grade 12.9 Bolts & (5) Grade 10.9 HI-Collar Lock Washers
(1) Allen Wrench
Installation Instructions
ALTA Warranty Information
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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