Both the HO Intercooled and Stage II Intercooled systems utilize the patented, proven and self-contained P-1SC ProCharger, a compact, 6-rib shared supercharger drive system, a highly-effective, air-to-air intercooler, OEM-quality mounting brackets, fuel system upgrade, tuning and all necessary supercharger and intercooler tubes for installation onto your 4V Mustang with no major modifications to your car or engine. ProCharger HO Systems for 4V Mustangs come standard with a 2 core intercooler; Stage II Systems feature a larger, 3 core intercooler. PROCHARGER 4.6L 4V CHOICES & UPGRADES: * Polished supercharger finish, * ProCharger D-1SC supercharger upgrade, * Helical Gearset for Noise Reduction (P-1SC & D-1SC only), * 3-Core Intercooler System Upgrade (standard with Stage II), * 950 HP Intercooler System Upgrade