click to zoom in

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

6 reviews Write a Review
MSRP: $179.00
(You save $26.85 )
Calculated at Checkout
5 customers are viewing this product
M7 Super Lightweight Crank Pulley | 4% - 53-3M7101-4

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

MSRP: $179.00
(You save $26.85 )



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.


Shipping & Returns

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. The complete return and refund policy can be forund here. M7 Return and Refund Policy!


FREE SHIPPING and Restrictions:

Free shipping on most all orders greater than $99USD to all mainland 48 US States. Some large items (greater than 50 lbs or dimensions greater than 36" may incur an additional handling fee. If FREE Shipping is offered M7 Speed has the option of which carrier to use. If you require a specific carrier (IE:FedEx or UPS or USPS) then you must select that at checkout and you will be charged for that specific shipping. The complete M7 Shipping Policy can be forund here. M7 Shipping Policy!

Shipping for International Orders:

We ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to select international destinations. International orders are classified as those shipping outside of the U.S., Canada, or U.S. territories.
ATTENTION: International Customers | All international orders are shipped EXWORKS which means that you are responsible to pay any and all customs fees, taxes and brokerage fees due. These fees and taxes and are not included in the base shipping charges. The additional fees will collected at the time of delivery.

If the shipping option, you want isn’t available please contact us at for a custom shipping quote. If postal service is selected for International shipping by the buyer for delivery service be aware that once the package leaves the US Customs center is no longer the responsibility of the US Postal Service or M7 and tracking information will not be updated are available. Worldwide transit times may vary and your package could take up to 6 weeks to arrive at its destination. We strongly advise against using postal for any international shipping.

Need help? We're available at704-663-0094 - Email us orlive help
to top