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VMP 2.49 in. Roush M90 Pulley & 90MM Idler Package (05-10 GT)

Market Price $228.99 You Save 13% ($29.99)
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  • Item 390782

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Ship to: Ashburn - 20149
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    Features & Details

    • New 2.49" Design
    • Allows For Use of Stock Belt
    • Provides 1/2 to 3/4 lbs. More Boost
    • Includes 90mm Replacement Idler for Better Belt Wrap
    • Tuning Recommended When Swapping From Stock Pulley
    • One-Piece Steel Powdercoat Design
    • Fits 2005-2010 Mustang GT with Roush M90 Blower
    Bolt On More Boost! VMP Performance's new 2.49 in. Pulley and 90mm Idler for the Roush M90 Supercharger allows you to squeeze even more power out of your blower with a simple bolt-on solution. This solution adds even more boost than aftermarket pulleys from Roush Performance, and it allows you to use your stock belt.

    Steel Powdercoat Design. This VMP Pulley is constructed from solid steel and features a black powdercoat finish, providing lasting protection against rust and corrosion. Unlike aluminum pulleys, this steel pulley's finish won't come off thanks to the metal composition.

    Installation. Installation requires basic hand tools and a little patience. VMP Performance created two options for this pulley solution based on your model year. Read below to learn the difference between 2005-2008 and 2008-2010 model pulleys. If you own a 2008 model, it's important to pick the right one.

    Application. This VMP Performance 2.49 in. Roush M90 Pulley and 90mm Idler Package is designed to fit on any 2005-2010 Mustang GT equipped with a Roush M90 Supercharger.

    Choosing The Right Pulley. For 2005 to early 2008 models, the M90 Supercharger features an older pulley set-up. If your M90 Supercharger has straight ribs, you own an older model. If your Supercharger features curved fins on top, you own a late model. Use this information to pick the right pulley option when adding to your shopping cart.

    Note: Coupon codes cannot be applied to this product.

    This product will not ship to addresses in California due to state regulations. Additionally, support will not be provided for tuning for California residents.

    Fitment: 2005 2006 2007 2008 2009 2010 Details

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) 2.49" M90 Pulley
    • (1) 90mm Replacement Idler
    Installation Info
    Tech Specs
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (3)

        3 Top Rated Questions

        How much hp increase will I see? I am running 5lbs of boost now and want to know if it will make a big difference. I also was thinking of adding a 50 shot a nitrous as well. Will that be safe in stock internals?

        • The VMP 2.49 in. Roush M90 Pulley will increase boost by 1/2 to 3/4psi netting a 5-15hp gain depending on your build. Where this kit shines is with boost being created more consistently through the RPM range due to the idler pulley, which provides better belt wrap to avoid belt slippage.

        Helpful (1)

        I’m running a m90 supercharger with a stock pulley on it with 7 psi. Will using this vmp 2.49 pulley stay below 10 psi?

        • The VMP 2.49 in. Roush M90 Pulley will increase boost by 1/2PSI to 3/4PSI, keeping boost below 10psi.

        Helpful (0)

        Is a tune required? and how much extra horsepower am i looking at?

        • A tune would not be required for this pulley and idler package. Horsepower can also vary depending on other components that are modified in your vehicle and what tune is currently being used.

        Helpful (0)
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          Customer Reviews (1) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Less than 1 Hour

          • Performance Gain 5 5
          • Fit 5 5

          • 5/5

            Installation Time: Less than 1 Hour

            June 29, 2017

            What i Expected!

            Everything fits flush and the power gains are crazy! Paired with a steeda intake, got me 430 to the wheels!


            Year: 2007 Submodel: GT

            Helpful (15)

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