The FiTech Ultimate LS 500 HP EFI Systems deliver best-in-class engineering, affordability, and performance for LS engine swaps and upgrades on cathedral port heads (LS1/LS2/LS6). These self-learning multi-port systems feature a low-profile 92mm billet aluminum throttle body, high-volume billet fuel rails, and a fabricated 3mm thick TIG-welded aluminum intake manifold optimized for 1,500-6,500 RPM powerband. Sequential spark and fuel control pairs 36 lb/hr injectors with a plug-and-play harness, color touchscreen self-learning ECU (handheld with suction-cup mount), dual fan control, tach/speedo outputs, on-the-fly AFR/timing adjustments, and optional transmission control for 4L60/65/70/80Eproviding effortless tuning, crisp response, smooth idle, superior drivability, and reliable 500 HP capability while keeping costs low for your next upgrade.
Pair it with the FiTech 50001 Go Fuel EFI Fuel Delivery Kit for complete fuel supply: an EFI-grade 255 LPH inline external pump (up to 600 HP support), 40 feet of 3/8-inch EFI hose for supply/return, dual billet aluminum filters (100-micron pre + 10-micron post), barb fittings, and mounting clampensuring clean, high-pressure delivery for street machines or performance builds.
- Low-profile 92mm billet throttle body and high-volume billet fuel rails for precise airflow and fuel distribution
- Fabricated 3mm aluminum intake manifold with 1,500-6,500 RPM powerband and cathedral port compatibility
- Self-learning color touchscreen ECU with sequential control, on-the-fly tuning, dual fan outputs, and tach/speedo drivers
- 36 lb/hr injectors, plug-and-play harness, and optional trans control for GM 4L60/65/70/80E transmissions
- Complete systems support up to 500 HP with smooth idle, sharp acceleration, better efficiency, and easy installation
