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

Item 388921
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    Features & Details

    • 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 -

    What's in the Box
    • (1) 90mm Idler Pulley
    • (1) Mounting Bracket Plate
    • (3) Fastner bolts
    Installation Info
    Will it fit my Mustang?

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        Questions & Answers (2)

        2 Top Rated Questions

        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

          Customer Reviews (7) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Less than 1 Hour

          • Performance Gain 4.714286 4.7
          • Fit 5 5

          • 5/5

            Installation Time: Less than 1 Hour

            September 27, 2019

            Get Up and Go

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


            Year: 2007 Submodel: GT500

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            May 26, 2019

            Works great with supercharger pulley upgrade

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


            Year: 2011 Submodel: GT500

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            November 02, 2017

            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.


            Year: 2014 Submodel: GT500

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            June 02, 2017

            C L Dual Bearing Idler

            Super easy install. Looks great and works fantastic.


            Year: 2014 Submodel: GT500

            Helpful (10)

          • 5/5

            Installation Time: Less than 1 Hour

            May 13, 2017

            Easy install

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


            Year: 2011 Submodel: GT500

            Helpful (11)

          • 5/5

            Installation Time: Less than 1 Hour

            November 28, 2016


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


            Year: 2013 Submodel: GT500

            Helpful (9)

          • 4/5

            Installation Time: Afternoon

            May 26, 2016

            Amazing product

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


            Year: 2013 Submodel: GT500

            Helpful (9)

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