Procomp Electronics exhaust flame thrower kits are a must-have for all hot rods. These kits can make up to 20 ft. flames shoot out of your exhaust on command. The main control box will control two spark plugs for optimal performance on dual exhaust vehicles. Detailed instructions ensure an easy installation and compatibility with most exhaust systems. The kits include a control box, wire loom, and wire diagram. Please note the kits do not include the coil and spark plugs needed for installation. These kits are for recreational use only.