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Belt Tensioner Assembly | Gen 1 Supercharged

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MSRP: $239.00
(You save $23.90 )
Calculated at Checkout
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Belt Tensioner Assembly | Gen 1 Supercharged

Belt Tensioner Assembly | Gen 1 Supercharged

MSRP: $239.00
(You save $23.90 )



Belt slippage is one of the main reasons your Gen 1 Supercharged MINI looses performance as time goes on. The supercharger is driven by the one drive belt.  If the tension on the belt is lost then the supercharger is not running at the speed it should and manimium boost pressure is not attained. If you are adding a M7 Overdrive pulley kit or just changing out your drive belt consider replacing the belt tensioner for optium peak performance.

Serpentine belt drives consist of a single belt that powers the Spercharger and all of the engine’s accessories on you Gen 1 MINI. Designed to maintain constant tension on serpentine belt drive, the Dayco Automatic Belt Tensioner features the OE design but with improved components and materials. Engineered to provide less operating range variations in tension for peak performance from your supercharger. This innovative design reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed and lessens the risk of belt noise and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. 

Superior design features include:

  • Heavy duty cast aluminum spring case that resists cracking and fatigue
  • Heavy duty cast aluminum arm offers additional strength and less distortion
  • Steel pivot provides additional strength for critical torque requirements.
  • Lubricated nylon pivot tube bushing and spring bushing for quieter performance

Dayco is a global leader in the research, design, manufacturing and distribution of essential OE and aftermarket engine products, drive systems and services for automobiles, trucks, construction, agriculture and industry.

Dayco’s contributions are integral to how people get from place to place, goods are transported, food is harvested, and infrastructure is built. The company operates according to long-held values — keeping promises, delivering on time all the time, and an intense commitment to service no matter what the obstacles. For more than a century, Dayco has overcome challenges, emerging stronger and smarter at every turn.

Dayco improves how the world moves by creating products, systems and relationships that endure.


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.

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