ULTIMATE LS
ULTIMATE LS
FiTech’s Ultimate LS Systems are complete, ready-to-run EFI solutions for LS engine swaps. Engineered for easy installation
and reliable performance, each system includes a throttle body, injectors, harness, sensors, and an ECU—all designed to work
together seamlessly. Whether you're swapping into a street car, cruiser, or hot rod, the Ultimate LS System brings proven EFI
control and clean packaging to your LS-powered build.
Complete EFI kit—includes ECU, harness, throttle body, fuel injectors, and
sensors
Supports a wide range of LS engines, from LS1 to LS7 and LQ-series
Self-learning ECU with no laptop required; tuning via included handheld
controller
Available with or without trans control for 4L60/4L80 applications
Compatible with drive-by-cable or drive-by-wire setups (depending on model)
Multiple HP ratings available to match your build: 500 HP, 750 HP, or 1000 HP
systems
Includes wideband O2, MAP, CTS, IAT, TPS, and IAC sensors
Supports return or returnless fuel systems
Clean harness design with labeled connectors for easy installation
3-year limited warranty and backed by FiTech’s expert tech support
EFI KITS 
EFI KITS 
WARNING: Cancer or Reproductive Harm
www.P65warnings.ca.gov
                                                                                 Not legal for use on Emissions Controlled Vehicles. 
Check with your local DMV, emissions testing facility or applicable State laws before installing. 
Emission Controlled Vehicle Information: 
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