


Outside Diameter: 70mm
Width: 27mm
Mount Hole Diameter: 17mm
Maintain proper belt alignment and long-term reliability in your Whipple supercharger system with this 70mm Grooved 6-rib replacement idler. Built from steel and pre-assembled with an OEM-quality bearing, this service part is designed for select Whipple Mustang, HEMI, and GM applications that use this pulley size and configuration.
This idler is designed as a direct replacement for compatible Whipple belt drive systems, helping restore dependable belt tracking and long-term durability in high-performance applications. With its grooved 6-rib design and 70mm diameter, it is intended for specific Whipple supercharger combinations and should be matched to the correct application before ordering.
Built for Whipple supercharger systems, this replacement idler reflects the same performance-focused engineering Whipple is known for. It is a simple service replacement for customers maintaining compatible belt drive configurations and looking to restore proper operation with the correct pulley specification.
Key Features
This replacement idler is designed exclusively for compatible Whipple supercharger systems and should not be used as a generic pulley substitution. Fitment varies by kit and configuration, so application should be verified before ordering.
Many parts are held in stock, or available to order for delivery in 10-14 days, subject to availability from our suppliers.
Orders placed before 1pm Monday - Friday may be despatched the same day, provided ALL items in your order are in-stock (exceptions apply).
For orders under £150 or to non-UK destinations, shipping charges are applied at Checkout.
You can check costs for shipping via the Checkout:
Our website pricing usually includes UK VAT.
Once you proceed to Checkout and update your delivery address to a non-UK destination, pricing in the checkout will automatically update to exclude UK VAT.
If you continue to browse our website during this, or subsequent sessions, the pricing you will see in our online store may automatically show as excluding UK VAT due to the delivery address now stored in the Checkout.
IMPORTANT – Orders delivered outside the UK will usually be subject to additional Local Customs and Import Duties. Such charges are the responsibility of the recipient and vary from country to country. Contact your local customs office for more details.
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