Power Wire Kit designed for use in Mustangs with stock Ford or higher AMP than stock Ford alternators was mounted in the center of the engine, or Mid-Mount. Made of the highest quality wire, with increased number of strands, electrolytic copper and bundle wrapping to reduce noise in high end sound systems while being incredibly flexible and show quality. If you use the stock wires AND this cable or remove it is your choice, but using this large (#4 Gauge) wire kit will add the safe carrying capacity needed for our high output alternators. In some applications you must use this cable to retain warranty coverage. All kits are provided with 200-amp Littlefuse Brand Fuse and Holder. Based on Littlefuse performance specifications and tolerances this is the appropriate rating please do not increase or decrease the fuse amperage value (wire color my vary)The PA Performance Premium Power Wire Kit will work with your factory alternator; however, it is designed for use in Mid_mount Locations.