The 2005 and newer Hemi Charger/Magnum Nitrous System from ZEX™ has a fuel tap adapter that replaces the factory fuel line assembly on the passenger side of the engine for a fully adjustable 75-125 horsepower boost. Much like the Hemi truck engine, the Charger and Magnum Hemi engines also uses a high pressure, 58psi fuel system. Because of this, special jets are included in the kit for the optimum tuning. These kits fit the SRT8 models perfectly to make an easy 500+ HP with the 6.1L engine.