M7 Super Lightweight Crank Pulley | 4% - 53-3M7101-4

A larger 4% oversize speed increasing crank pulley will add just that little extra added supercharger boost and performance. This beautiful design is a result of advanced computer modeling and high precision CNC machining. Made in the USA from billet 6061-T6 aerospace grade aluminum alloy with a deep black anodize coating, the M7 Speed 4% oversize - speed increasing pulley will provide a lifetime of reliable use. Weighing in at just 13 ounces and supplied with a brand new high strength ARP bolt and precision ground flat washer, the M7 Speed 4% crank pulley is best in class. Each M7 Speed product is Engineered....Tested....and Proven to PERFORM!

SKU: 53-3M7101-4

Availability: In stock

Regular Price: $179.00

Sale Price $152.15


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    The M7 Speed 4% oversize - speed increasing crankshaft pulley will add power, acceleration and performance to your MINI.  Speeding up your supercharger safely adds "low end" boost and torque which gets your MINI Cooper going. Weighing in at a scant 13 ounces, (an amazing 88.5% less than factory) the lightweight M7 Speed 4% Crank Pulley reduces crankshaft rotational mass which equals additional increased horsepower, torque and throttle response. 


    This beautiful design is a result of advanced computer modeling and high precision CNC machining. Made in the USA from billet 6061-T6 aerospace grade aluminum alloy and finished with a deep black anodized coating and laser etching.  The Micro V-Belt grooves are machined to exacting SAE J1459 specifications for minimum belt slippage at maximum boost. Use this in combination with the M7 Speed 16% Supercharger Technology Pulley for maximum performance and boost yourself to the next level of MINI tuning and performance.

     From the factory, the MINI suffers from no positive drive key on the crankshaft snout to drive the lower pulley. The factory pulley is press fit onto the crank. All aftermarket pulleys are slip fit at best and rely on the bolt to provide adequate clamp force to prevent the pulley from slipping. The M7 Speed crank pulley is engineered with an interference fit onto the crankshaft eliminating pulley slippage on the crankshaft.


    • Super Lightweight. Weighs in at 13 ounces (0.3 kg)
    • Save 6.2 lbs (2.8 kg) from stock
    • Reduces damper weight by an amazing 88.5%!
    • Prefect balance is achieved by symmetric design and high precision machining.
    • Industry exclusive interference thermal fit to eliminate high RPM slippage on the crankshaft.
    • Supplied with a brand new high quality ARP Racing bolt and precision ground flat washer
    • Micro V-Belt grooves are machined to exacting SAE J1459 specifications


    Simple to install. Heat the pulley to 275/300oF (135/150oC) in your kitchen oven or using a small propane torch and heat gun and the pulley will drop straight onto the crank. When it cools it will be super tight onto the crank. Finish the installation with the supplied ARP bolt and precision flat washer and presto...more power, more reliability and more overall performance for your supercharged MINI Cooper.


    Fitment Notes :

    2008MINI CooperConvertible (R52)BaseL4 1.6L NA
    2008MINI CooperConvertible (R52S)SL4 1.6L Supercharged
    2007MINI CooperConvertible (R52)BaseL4 1.6L NA
    2007MINI CooperConvertible (R52S)SL4 1.6L Supercharged
    2006MINI CooperConvertible (R52)BaseL4 1.6L NA
    2006MINI CooperConvertible (R52S)SL4 1.6L Supercharged
    2006MINI CooperHatchback (R50)BaseL4 1.6L NA
    2006MINI CooperHatchback (R53)SL4 1.6L Supercharged
    2006MINI CooperHatchback (R53)S JCWL4 1.6L Supercharged
    2005MINI CooperConvertible (R52)BaseL4 1.6L NA
    2005MINI CooperConvertible (R52S)SL4 1.6L Supercharged
    2005MINI CooperHatchback (R50)BaseL4 1.6L NA
    2005MINI CooperHatchback (R53)SL4 1.6L Supercharged
    2005MINI CooperHatchback (R53)S JCWL4 1.6L Supercharged
    2004MINI CooperHatchback (R50)BaseL4 1.6L NA
    2004MINI CooperHatchback (R53)SL4 1.6L Supercharged
    2004MINI CooperHatchback (R53)S JCWL4 1.6L Supercharged
    2003MINI CooperHatchback (R50)BaseL4 1.6L NA
    2003MINI CooperHatchback (R53)SL4 1.6L Supercharged
    2003MINI CooperHatchback (R53)S JCWL4 1.6L Supercharged
    2002MINI CooperHatchback (R50)BaseL4 1.6L NA
    2002MINI CooperHatchback (R53)SL4 1.6L Supercharged
    Additional Info
    Additional Info
    Manufacturer M7 Speed
    Color No
    Mfg's Part # 53-3M7101-4
    Shipping Weight 3.0000
    Length 7
    Width 9
    Height 2
    Country of Manufacture
    Customer Reviews (3)
    LOVE IT!!
    Would Recommend
    Bought this after an ALTA performance pulley failed , this is a much better design , lighter , looks great and quality is by far better ... paired with a performance supercharger pulley ... I have wine all day and don't get tipsy >>> :) Review by Zero2sixty (Posted on 4/29/2021)
    Great quality
    Would Recommend
    Was very surprised of the over all quality. This pulley was easy to install , no pullers needed, just heat from a conventional oven. The performance was a noticeable difference Review by Td (Posted on 10/17/2017)
    Awesome Product
    TC Neel and Andrew H. and I put on the crank pulley this weekend, it's Awesome. Thanks Again for all the help. You guys rock!! Review by TC Neal (Posted on 4/10/2017)
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