Ultimate Rebel LS 750HP EFI System wo/Trans Cont

The FiTECH Ultimate Rebel LS 750HP EFI System without transmission control is a comprehensive multi-port fuel injection kit engineered for GM LS-series engines seeking high-output performance and modern drivability. This system combines a 102mm aluminum throttle body with 36 lb/hr fuel injectors to deliver precise fuel metering across a wide RPM band, supporting engines capable of 750+ horsepower. The black powder-coated finish provides corrosion resistance in harsh engine bay environments, while the complete kit architecture eliminates the need for external computer control of transmission functions, simplifying installation in swap applications and standalone engine builds.

Multi-port injection delivers fuel directly at each intake valve, improving atomization and combustion efficiency across throttle positions. The 102mm throttle body diameter ensures adequate airflow for high-displacement LS applications without restricting peak horsepower potential. With 36 lb/hr injectors sized for serious displacement and boost scenarios, the system handles naturally aspirated big-block configurations as well as forced-induction setups running moderate boost levels. The absence of transmission control functions streamlines wiring complexity for engine-only swaps, street rods, and race vehicles where the transmission is managed independently or remains naturally aspirated.

This kit addresses builders and engine shops integrating LS powerplants into custom platforms—hot rods, classic car restorations, lightweight chassis conversions, and off-road applications. It suits enthusiasts prioritizing engine management sophistication without factory transmission electronics. The system is equally valuable for dyno testing, race engine development, and situations where a standalone ECU or dedicated transmission controller is already in place. Weighing 35.05 pounds as a complete assembly, the kit maintains compact dimensions ideal for tight engine bay layouts common in retrofit scenarios.

FiTECH Fuel Injection systems are recognized in performance LS communities for bolt-on integration and tuning accessibility. The Ultimate Rebel line specifically bridges the gap between carbureted simplicity and full factory complexity, making it a practical choice for builders seeking reliability without factory computer overhead. The 750HP rating reflects real-world dyno validation in typical LS displacement scenarios (427–454 cubic inches naturally aspirated, or smaller displacement with boost).

Verify your LS-series engine family and intended peak horsepower before ordering to confirm injector sizing and throttle body compatibility with your fuel pump and ECU strategy.