If your alternator has between 80 and 140 amps of output it pays to upgrade your wiring. Our heavy 8 and 10 gauge wiring kit adds an extra measure of safety as well as providing maximum voltage with minimal drop. Includes wire and connectors. We recommend the JEGS 50 amp fuse, block and cover (555-10520, sold separately) as an added safety feature to complete this installation. Should a power surge or spike occur, a fuse can be replaced easily versus a fusible link which requires rewiring the circuit. Made in the U.S.A.