Ultimate LS 500 HP EFI System/ Short LS7 Intake

The Ultimate LS 500 HP EFI System with Short LS7 Intake represents a purpose-built fuel injection solution engineered for high-performance LS-series engine builds. Designed for enthusiasts and professionals seeking reliable, computer-controlled fuel delivery on naturally aspirated and forced-induction applications, this complete kit eliminates the guesswork of carburetor tuning while delivering repeatable, precise engine management. Whether upgrading a street engine, competition platform, or restoration project, the Ultimate LS 500 HP system bridges modern fuel injection technology with classic LS platform compatibility.

The system features a 92 mm throttle body paired with 36 lb/hr injectors, calibrated to support up to 500 horsepower on pump gasoline without requiring external tuning boxes or standalone ECU programming. The aluminum intake manifold is finished in black powder coat, protecting against corrosion while integrating the short LS7 intake port design for improved volumetric efficiency and mid-range torque response. This multi-port fuel injection architecture meters fuel directly into each cylinder, reducing lean spots and promoting consistent combustion across the entire RPM band, critical for both street reliability and track performance.

The Ultimate LS 500 HP EFI System is ideal for GM LS-series engine platforms including LS1, LS2, LS3, LS7, and LS9 variants, making it a drop-in solution for street rods, trucks, sports cars, and marine applications. Installation requires basic fuel system plumbing, throttle cable routing, and wiring harness integration—within the capability of experienced engine builders and well-equipped shops. Weighing 42.74 pounds and packaged at 19 x 17 x 29 inches, the complete kit arrives ready for immediate integration into existing engine bays with minimal modification.