FiTech Fuel Injection 70003 Ultimate LS1/LS2/LS6 750HP Kit

The FiTech Fuel Injection 70003 Ultimate LS1/LS2/LS6 750HP Kit is a complete self-tuning EFI system designed for LS engines with cathedral port LS1/LS2/LS6 heads. Supporting up to 750 horsepower, it offers a reliable upgrade for LS-based Chevrolet engines from 4.8L to 6.0L, delivering precise fuel and spark control for enhanced performance.

Key Features

Low profile 102mm fabricated aluminum intake manifold with 3mm thick TIG welded construction
Self-learning ECU with color touch screen controller for easy setup and configuration
Sequential fuel and spark control with individual cylinder trim and dual Bosch wideband O2 sensors
3 BAR MAP sensor supports up to 30 PSI boost for power adder applications
Billet fuel rails with AN fittings and fuel crossover included
Compatible with 24X and 58X crank and cam sensors
Includes 55 lb/hr flow-matched injectors and custom wiring harness using factory coil pack sub harness
Two programmable fan control outputs and tach/speedometer output drivers

Fitment

Cathedral Port LS1/LS2/LS6 heads
Small Block V8 GEN III/IV LS-based Chevrolet engines from 4.8L to 6.0L, supporting up to 750 HP

Kit Contents

102mm billet aluminum throttle body
Hand-held color touch screen controller with cable and windshield mount
LS ECU and custom plug-and-play wiring harness
55 lb/hr injectors and high volume fuel rails with mounting hardware and AN fittings
3 BAR MAP sensor, throttle position sensor, idle air control motor, and idle air temperature sensor
Dual wideband O2 sensors and stainless oxygen sensor bung kit (clamp or weld on)

Important Notes

Not CARB approved; not legal for use on pollution-controlled vehicles
Throttle body clearance may require a new water pump bracket depending on truck accessories
Optional throttle cable mounting bracket available separately (FiTech part number 70063)

Note: Verify fitment compatibility before ordering. Installation requires basic mechanical skills and tuning knowledge.