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C&L Dual Bearing Idler Assembly (07-14 GT500)

Item 388921
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Eliminates Belt Slippage
      • 3 Position Adjustable
      • 90mm Double Bearing Idler Pulley
      • CNC-Machined Aluminum
      • Black Anodized Finish
      • Allows Original Supercharger Belt to Be Reused
      • Made in the USA
      • Fits 2007-2014 Shelby GT500 with Smaller Diameter Pulley


      Eliminate Belt Slippage. Is belt slippage robbing your mighty Shelby GT500 of power? Then reclaim it with a C&L Performance 90mm Double-Bearing Auxiliary Idler Pulley Kit from AmericanMuscle. The C&L idler pulley bolts up just to the left of the supercharger pulley allowing for maximizing belt wrap and to eliminate belt slippage.

      Three Position Adjustable. C&L engineered their Dual Bearing Idler Bracket with three preset pulley positions to remove the desired amount of excess belt slack and to avoid the annoying problem of unwanted belt slippage that occurs over time on lesser "slotted" brackets.

      Superior Materials. CNC-machined in the USA from billet aluminum for superior strength, this C&L Performance 90mm double bearing idler pulley and mounting bracket are completed in a black anodized finish for impressive good looks and long lasting resistance to surface wear and corrosion.

      Application. This C&L Supercharger Double-Bearing Idler Pulley Kit is specifically designed for use on the 2007 to 2014 Shelby GT500 Mustangs equipped with the Supercharged V8 engine, that have upgrade to a smaller diameter supercharger pulley. Technical Note. Will not fit with Whipple 4.0L supercharger.


      Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 Details

      MPN# 388921

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (7)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 7 customers

      Installation Time: Less than 1 Hour

      • September 27, 2019

        5 2007 GT500 - TheKGOne Installation Time: Less than 1 Hour

        Get Up and Go

        After this was installed, I picked up 5 more psi to get 15psi of boost.

        Helpful (0)
      • May 26, 2019

        5 2011 GT500 - ryan Installation Time: Less than 1 Hour

        Works great with supercharger pulley upgrade

        Easy to install. Move coolant hoses to make your life easier. Pulley is adjustable and eliminates belt slippage

        Helpful (0)
      • November 02, 2017

        5 2014 GT500 - Larrysmustang2010 Installation Time: Less than 1 Hour

        No more slipping..

        Adjusted the pulley all the way up. Installed it with the stock pulley on the super charger. May go smaller but it’s adjustable. More surface area for the belt I think helps. Haven’t seen any rubber on the charger snout. And it’s quiet.

        Helpful (9)
      • June 02, 2017

        5 2014 GT500 - Ray80 Installation Time: Less than 1 Hour

        C L Dual Bearing Idler

        Super easy install. Looks great and works fantastic.

        Helpful (10)
      • May 13, 2017

        5 2011 GT500 - Konasnake Installation Time: Less than 1 Hour

        Easy install

        The idler was very easy to install. I especially like that it is black because it keeps the stock look.

        Helpful (11)
      • November 28, 2016

        5 2013 GT500 - 08FordPower Installation Time: Less than 1 Hour


        Not a bad install tensioner was a bit hard. Pulley looks great on the car and so far no more slippage!

        Helpful (9)
      • May 26, 2016

        4 2013 GT500 - Steezydbricks Installation Time: Afternoon

        Amazing product

        I have it for my gt500 and is amazing and it gave my gt500 so much boost it was amazing

        Helpful (9)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Do I need to grease pulley before install?

      Do you need a tune after install? Thank you!

      • A tune is recommended.

      Helpful (0)

      Does this replace the stock idler pulley?

      • This will replace the stock idler pulley.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) 90mm Idler Pulley
      • (1) Mounting Bracket Plate
      • (3) Fastner bolts

      Will It Fit My Mustang

      • GT500 - 07, 08, 09, 10, 11, 12, 13, 14

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