Ram owners, ProCharger has you taken care of with bolt-on power for your 2004-2008 Dodge Ram with the HEMI 5.7L engine. An industry leading 45-50% power gain on just 6 psi of intercooled boost on otherwise stock engines running high quality pump gas. The HO System comes standard with a highly-effective 3-core high mount air-to-air intercooler, easy installation, minimal relocation of components, no need for external oil feed and return lines and avoids having to deal the complexity and maintenance issues of an air-to-water-to-air intercooler configuration. HO INTERCOOLED SYSTEM Bolt-on 130+ HP with just 7 psi of boost. Self-contained oiling design–no external oil lines 1-year supercharger warranty is standard, optional 3-year PCM Tuning supplied (complete system only) Billet impeller and supercharger gear cases, with industry-leading 4.10:1 step-up ratio Easiest installation, only requiring common hand tools Air-to-Air Intercooling provides consistent, reliable power, even in extreme conditions Optimized supercharger and intercooler location minimizes heat transfer Retains the factory intake manifold OPTIONAL UPGRADES Polished, or black supercharger and bracket finish Helical gearset for noise reduction (P and D series) Headunit upgrades such as P-1X, D-1X, or F-Series Low mount intercooler option (2006-08 models only)