When more power and better performance are your goal, the factory charging system wiring could be a limitation. This kit comes with everything you need to remove very bit of restriction from the factory wiring. The kit uses all 2 gauge ultra-flexible, chemically resistant, insulated wiring rated to 221 degrees F. The kit comes with all the wire you need to run a power wire from the trunk to the engine bay, a wire from the supplied fuse to the fuse box, a wire from the supplied fuse to the starter, a wire from the fuse box to the alternator, a ground from the engine to the chassis, and the ground wire from the battery to the chassis. It also comes with all the clamps, gold plated connectors, stainless steel harware, etc you need for installation.  Mounting kit or battery box for battery sold separately.