ProCharger HO Systems and Tuner Kits Intercooled ProCharger Systems and Tuner Kits for 2012-14 6.4L SRT8 Chargers offer a gain of 200+ horsepower with a conservative 7 psi, on otherwise stock engines. This industry leading technology provides the coolest charge air temperatures, largest power gains and most repeatable performance available. For those wanting to purchase a tuner kit and have custom tuning performed by a local dealer, gains can exceed 225+ HP. ProCharger’s 6.4L/392 systems and tuner kits feature the industry standard P-1SC-1 ProCharger, with self-contained oiling, billet impeller and billet gear cases. This kit also features highly effective and reliable air-to-air intercooling, which combines with an advantaged mounting location and best in class supercharger efficiency to minimize heat production and heat transfer, and maximize reliable power gains.