Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

Welcome to our Fall Website Refresh. Beta testing in progress. Phone Number: 805-267-9762 This month's discount code: HALLOWEEK3 

SPE Motorsport 2020-2022 Ford Mustang GT500 Adjustable Auxiliary Idler

The SPE 2020+ GT500 Adjustable Auxiliary Idler consists of a precision CNC machined billet aluminum bracket and extreme duty double ball bearing idler pulley anodized black. […]

$219.99

Available

SPE Motorsport 2020-2022 Ford Mustang GT500 Adjustable Auxiliary Idler

The SPE 2020+ GT500 Adjustable Auxiliary Idler consists of a precision CNC machined billet aluminum bracket and extreme duty double ball bearing idler pulley anodized black. Adjuster components & hardware are made of billet 304 stainless.

The adjustable auxiliary idler bolts to existing bolt bosses on the vehicle’s supercharger snout and locates the pulley just to the left of the supercharger pulley, maximizing belt wrap and eliminating slippage. It is designed to work in conjunction with the SPE GT500 Blower Pulley System & is perfect to pair with 2.6” and smaller blower pulley. No modifications to the vehicle are necessary.

The Adjustable Aux Idler allows you to get the perfect amount of wrap with varying belt lengths and/or pulley sizes. The idler assembly ships fully assembled with the required fasteners and illustrated installation instructions.

FEATURES:

  • CNC Billet aluminum bracket
  • CNC Billet Stainless hardware and adjuster parts
  • Billet Aluminum Idler pulley
  • Nachi dual high-speed bearings
  • 270+ degree belt wrap capable
  • Helps eliminate belt slip
  • Simple installation
  • No modifications necessary

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Function Factory Performance takes “customer service” very personally. We understand that finding the right parts can be overwhelming. Education and awareness are the principles that keep us ahead of the curve. Let us make this experience simple, easy, and awesome, so without hesitation give us a call at (480) 576-8606, feel free to direct message on our live chat or CLICK HERE to contact us via email.

Make sure to follow us on Instagram: @FFPerformanceAZ and Youtube.

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Frequently Asked Questions

How long does it take for my parts to ship?
If it’s in stock and ready to roll, your order usually hits the road within 1–3 business days.

For made-to-order or specialty items (like carbon fiber parts or custom builds), the turnaround can take up to 8 weeks — perfection takes time.

Either way, we’ll keep you updated so you know exactly when your parts are leaving the pit lane.
Do you send tracking with my order?
Absolutely. Once your order ships, you’ll receive an email with a tracking link so you can follow its journey from our shop to your doorstep.

If your order ships via freight, you’ll get a separate email with a direct link to the carrier’s tracking page — easy and stress-free.
What happens if my parts get lost or damaged?
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.

If your shipment is lost, just email or call us — we’ll help track it down and guide you through the next steps to make it right.
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