2003-2004 Ford Mustang Cobra
Interchangeable Crank Pulley Kit (Includes One Pulley Ring)
This comprehensive kit allows the user to replace the heavy factory crankshaft pulley and cage assembly with a lightweight, precision-machined aluminum hub and interchangeable outer ring. The kit includes all of the necessary hardware, including a billet bracket to cleanly and securely relocate the factory crank idler pulley. Once this kit is installed, the user can adjust the vehicle's boost level by simply changing the outer pulley ring to any of the available Metco pulley rings, a process that takes just minutes. In addition to the increased power available with this kit, installation of our crank pulley eliminates the failure-prone bushings and center bearing associated with the original crank pulley assembly. Our kit also makes replacing the Cobra's accessory drive belt a very simple process.
This kit is custom-engineered to be a complete bolt-on, with no cutting, drilling, or irreversible changes required. In most cases, total time required for installation is about two hours. Please note that PCM calibration may be necessary with any change in the boost level.
The 14mm hex tool is offered as an optional installation aid (shown in images, not included) to break the original crank pulley bolt loose. It is CNC-machined from 1045 steel and then heat-treated for additional strength. This tool is very strong and is often appreciated when dealing with an extra-stubborn crank pulley bolt. As an alternative, a 14mm hex bit to fit your favorite ratchet or breaker bar is available from many sources. A 14mm hex bit (or our hex tool) is required for installation of this kit if the original crank pulley assembly is in place.
Pulley ring choices include: 1" smaller than stock diameter (for use with aftermarket superchargers using pump fuel), stock diameter, +2 lbs, +4 lbs, +6 lbs, +8 lbs, and +10 lbs. Please make your selection below.
A special crank pulley hub is available for applications using the ATI harmonic balancer for the Cobra (ATI PN 918036). This custom crank pulley hub is listed elsewhere in this section, and can be substituted for the standard crank hub included in this kit for a minimal charge. Please indicate your balancer configuration by choosing the appropriate option above.
Please note that Metco offers underdrive alternator pulleys that are recommended for use with +2 lb, +4 lb, +6 lb, and +8 lb, (and larger) crank pulley rings. These alternator pulleys are also listed in the Mustang Cobra section of our site.
Metco Motorsports crankshaft pulley rings as included in this kit are also available separately.
Beware of unauthorized knockoffs offered by LFP. These parts are not the same as those offered by Metco Motorsports, and Metco Motorsports has no affiliation with LFP whatsoever.
