Have you just installed a new supercharger or idler pulley on your 03-04 Cobra and need a new belt? Check out our belt guide for the right info!
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LMR has put together this guide to help you decide which belt you need for most of the popular combos using a stock Eaton blower and multiple pulley combinations. Here are the breakdowns below explaining most of the possible combinations for the 03-04 Ford Mustang Cobra.
While we have determined that these lengths are the most accurate lengths needed, these belt suggestions should be used as a guide. Each recommendation should be within 0.5" of less of the ideal length. With differences in tension strengths, manufacturers, and OEM tolerances, variances in length can differ.
2003-2004 Cobra Supercharger Belt Guide | ||||||
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Pulley Setup - With Factory Eaton Supercharger | 3.65" Stock Upper Pulley | 3.00" Upper Pulley | 2.90" Upper Pulley | 2.80" Upper Pulley | 2.76" Upper Pulley | 2.70" Upper Pulley |
Stock Lower Pulley 7.375" | 75.50" | 74.50" | 74" | 73.50" | 73.50" | 73.50" |
2 lb. 8.0" Lower Pulley | 77" | 76.50" | 76" | 75.50" | 75.50" | 75.50" |
4 lb. 8.6" Lower Pulley | 78" | 77.50" | 77" | 76.50" | 76.50" | 76.50" |
6 lb. 9.10" Lower Pulley | 79" | 78.50" | 78" | 77.50" | 77.50" | 77.50" |
8 lb. 9.50" Lower Pulley | 80" | 79.50" | 79" | 78.50" | 78.50" | 78.50" |
10 lb. 10.0" Lower Pulley | 81.50" | 81" | 80" | 79.50" | 79.50" | 78.50" |
Stock w/ 4 Piece Idler Kit | 77" | 75.50" | 75.50" | 75.50" | 75.1" | " |
For those who are running a larger alternator pulley, follow the guidelines outlined by Metco.