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These kits address the shortcomings of the failure prone stock 6G alternator found on 99-04 Mustang GT's.  They feature a larger case for improved cooling and more efficient power production, and for many a better looking design. This alternator is built with quality parts, and is backed by a lifetime warranty!


Fits 99-04 4.6 Mustang GT's.  This alternator has been installed with both Roush and Saleen supercharger systems and fits perfectly.  

KMJ Alternator Kit For 99-04 GT

PriceFrom $299.99
  • A Lifetime Warranty is standard for ALL domestic orders. Lifetime replacement warranty covers the original purchaser for defects in materials and workmanship. Should the unit fail to function we will replace it free of charge minus shipping costs to us. Warranty does not cover improper installation or physical damage.  Special coatings/finishes will be rebuilt using the original housings. International orders are not covered under warranty due to logistic expenses.  

    *See warranty and returns policy for complete details

  • Every KMJ Alternator is hand built to order. Please allow 5-7 business days for shipment. (8-10 days for special finishes or during sales) Expedited service available in some circumstances.  Once order is placed it cannot be cancelled as we order parts for builds immediately upon purchase. 

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