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.