2003-2004 Mustang Cobra
Underdrive Alternator Pulley
Our underdrive alternator pulleys are CNC-machined from certified 6061-T6511 billet aluminum and black anodized for long-lasting surface protection. The pulleys are sized to maintain OEM alternator speeds when used in 2003 and 2004 Mustang Cobra applications equipped with our Interchangeable Crank Pulley Kit.
An underdrive alternator pulley is generally recommended when using our +2 lb and larger crank pulley rings. We manufacture a specific underdrive pulley for each of the popular crank pulley ring sizes, as shown in the drop-down box. Please note that these pulleys are sized to maintain OEM alternator speeds, but applications and alternator characteristics may vary, and in the case of aftermarket or custom alternators specific size recommendations should come directly from your alternator supplier.
These alternator pulleys install as a direct replacements for the factory alternator pulley and require no modifications or special tools. A longer belt will be required (see belt length chart under Resources tab). Please feel free to contact us for details if you need assistance properly sizing your belt.
All Metco Motorsports alternator pulleys are black-anodized and will differ slightly from the images showm. These pulleys may be available in a 10-rib configuration for custom applications. Please contact us for details on pricing and availability: [email protected].
These alternator pulleys do not fit the Mechman, Nations, Denso, or J2 alternators. These pulleys are intended for the OEM 6G (and similar, ie 3G) alternator used in select Modular Ford applications. These are 8-rib pulleys.
Part Numbers: MAP3000, MAP3200, MAP3500, MAP3700