7 TUNED PORT INJECTION ASSEMBLY, COMPRISING A PROGRAMMABLE DIGITAL ELECTRONIC CONTROL UNIT, AN INTAKE ASSEMBLY WITH MULTI-POINT FUEL INJECTORS, A PRESSURIZED FUEL DELIVERY SYSTEM, AND ENGINE MONITORING SENSORS, SOLD AS A UNIT; A MULTI-POINT INJECTION ASSEMBLY COMPRISING A PROGRAMMABLE DIGITAL ELECTRONIC CONTROL UNIT, A MANIFOLD, FUEL RAILS, A THROTTLE BODY, A PRESSURIZED FUEL DELIVERY SYSTEM, AND ENGINE MONITORING SENSORS, SOLD AS A UNIT; A THROTTLE BODY SINGLE-POINT INJECTION ASSEMBLY, COMPRISING A THROTTLE BODY, A PRESSURIZED FUEL DELIVERY SYSTEM, AND ENGINE MONITORING SENSORS, SOLD AS A UNIT; HIGH PERFORMANCE AIR DOORS USABLE WITH THE ABOVE ASSEMBLIES; TUNED RAM TUBES USABLE WITH THE ABOVE ASSEMBLIES; FUEL RAILS; AND FUEL INJECTORS