Guaranteed Free Delivery by 12/24! available on most items - Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Mustang! Enter Daily
Cyber Monday Prices Still Live Shop Now

Crank Pulley Kit - 4lb Boost (03-04 Cobra)

Item 49707
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $479.99 You Save 10% ($50.00)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Interchangeable Crank Pulley Kit
    • Allows You to Adjust Your Boost Level
    • CNC-Machined Aluminum Construction
    • Includes 8.6" Crank Pulley Ring (+ 4 lbs)
    • Fits 2003 to 2004 SVT Cobra
    Interchangeable Design. The Crank Pulley kit from Metco Motorsports allows you to replace the stock crankshaft pulley and cage assembly with a lightweight aluminum hub that features an interchangeable outer ring. With the kit installed you can adjust your Cobra's boost level at any time by simply changing the outer pulley ring to any of the pulley rings available from Metco, the process is easy and takes just minutes.

    More Power. The Metco Crank Shaft Pulley Kit includes an 8.6" outer pulley that will add an additional 4 lbs of boost (compared to the stock 7.4" pulley) to your SVT Terminator Cobra for even more tire shredding power.

    Application. This Metco Motorsports Crank Pulley Kit is specifically designed for use on the 2003 to 2004 SVT Cobra Mustang equipped with the DOHC 4.6L Supercharged V8 engine.

    Fitment: 2003 2004 Details

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Crankshaft Hub
    • (1) Outer Pulley
    • (1) Mounting Bracket
    • Installation Hardware
    Installation Info
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (8)

        5 Top Rated Questions

        will this 4# lower work with a 2.81 upper?

        • No not on a factory're just going to overwork it and produce heat.....

        Helpful (3)

        With an aux idler. And S/C pulley of 2.93 its been Bama tuned and long tube headers. It started stock boost 8. 2.93 Pulley went to 10 psi. Long tube headers an no cats dropped boost back down to 6 to 8psi. Would the metco lower pulley kit bring psi back up to say 10 to 11psi? And if so will it work the blower to hard? Also does it effect assesorys like altanator, cus pulley ratio change?

        • The Metco Motorsports Crank Pulley Kit will increase boost by approximately 4psi, this should put you to 10-12 psi. The reason the boost went down with the long tubes is that the lower restriction causes less pressure, so the airflow increased, but pressure dropped. This kit combined with your other modifications should not overtax the stock Eaton supercharger, however you will be getting close to the max efficient boost level, as after this the heat the Eaton generates starts to outweigh the boost gains, and a more efficient supercharger would work better.

        Helpful (1)

        Already have a 2.8 upper, will this require bigger injectors?

        • This would not require bigger injectors no.

        Helpful (0)

        Will this over work the Eaton supercharger if it already has a 2.76 pulley? If so will a aftermarket heat exchanger fix that?

        Do i have to tune the car after intall

        • When installing the Metco Motorsports Crank Pulley Kit it is best to retune the car, or consult with your tuner if a new tune will be required compared to your existing tune.

        Helpful (0)
        Post Your Question
        3 More Questions
        The stock crankshaft pulley was damaged on the 2003 cobra engine I'm installing. Will this take the place of the damaged pulley and assembly? 1 answer
        Will the #4 lower pulley work with a ported eaton with a 2.81? What is the normal setup with a ported eaton. 1 answer
        Will this add 4psi of boost on top of the boost added by a 2.81" supercharger pulley? 1 answer

          Customer Reviews (4) Write a Review

          Overall Rating 4.5

          out of 5 stars

          Installation Time:Full Day

          • Performance Gain 4.666667 4.7
          • Fit 5 5

          • 4/5

            Installation Time: Weekend

            March 18, 2019

            Boost pulley

            Install was easy the hard part was getting the factory crank pulley off. That was no simple task also you will need a 1400foot pound impact to brake it free. Only other thing is American muscle needs to add belt size chart to this product.


            Year: 2004 Submodel: Cobra

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            April 02, 2018

            Metro 4lb lower kit

            Fitment was great and looks good. With a new dyno tune it Snatched me about an extra 100hp on my build.


            Year: 2003 Submodel: Cobra

            Helpful (7)

          • 4/5

            Installation Time: Afternoon

            February 23, 2018

            Looks great

            My big advice, don’t do what I did and over estimate yourself, follow the instructions they say to do something and at first your like that doesn’t make since I’ll figure it out on my own and ya ratchets later you realize what they want you to remove one thing before removing crank pulley from your car!


            Year: 2003 Submodel: Cobra

            Helpful (7)

          • 5/5

            August 22, 2016

            Good product

            It was a quick and easy installation and more boost :)


            Year: 2004 Submodel: Cobra

            Helpful (9)

          Related Mustang Categories