These kits help to improve weight distribution and increase room in the engine bay. They feature a universal fit for Group 24-31 batteries (tray measures 13'' L x 7'' W Inside). Includes 2 gauge copper cable (20' positive 3' negative) cable lugs cable clamps grommets ground bolt J-bolts mounting bracket and tray. Mounting hardware not included. Note: Battery must be located behind a firewall in the trunk or hatch area and J-bolts welded shut to be NHRA legal.