FiTech Fuel Injection Ultimate LS 500 HP EFI System With Short Cathedral Intake & Transmission Control Master Kit

The FiTech Fuel Injection Ultimate LS 500 HP EFI System With Short Cathedral Intake & Transmission Control Master Kit is a complete self-tuning EFI induction system designed for LS1/LS2/LS6 engines, delivering up to 500 HP. It includes a low-profile short cathedral port intake manifold, 92mm throttle body, and advanced transmission control compatible with GM 4L60, 4L65, 4L80, and 4L85 transmissions, making it ideal for DIY hot rodders and professional tuners alike.

Key Features

Fabricated 3mm thick aluminum TIG welded short cathedral port intake manifold with 1500-6500 rpm power-band
92mm high-flow billet aluminum throttle body with 7° cable-operated design
Self-learning ECU with color touch screen controller for easy setup and configuration
Sequential fuel and spark control with individual cylinder trim and Bosch wideband O2 sensor
Billet fuel rails with AN fittings and fuel crossover, including 36 lb/hr flow-matched injectors
Transmission control for GM 4L60, 4L65, 4L80, and 4L85 automatic transmissions
Plug-and-play wiring harness using factory coil pack sub harness

Fitment

Fits Cathedral Port LS1, LS2, and LS6 cylinder heads
Compatible with small block Gen III/IV LS-based Chevrolet street and performance engines from 4.8L to 6.0L producing up to 500 HP
Transmission control suitable for GM 4L60, 4L65, 4L80, and 4L85 electronically controlled automatic transmissions

Specifications

Intake manifold height: 6.5 inches
Throttle body: 92mm, cable-operated, 7° angle
Compatible with 24X and 58X crank and cam sensors

Kit Contents

92mm billet aluminum throttle body
Hand-held color touch screen controller with cable and windshield mount
Ultimate LS ECU
36 lb/hr fuel injectors
High volume billet fuel rails with AN fittings and fuel crossover
Go Fuel Tight Fit regulator and in-tank fuel pump (1000 HP module)
Custom plug-and-play wiring harness
Throttle Position Sensor, Idle Air Control Motor, Idle Air Temperature Sensor
Wide band O2 sensor and stainless steel O2 sensor bung kit (clamp or weld on)

Important Notes

Throttle body clearance may require a new water pump bracket depending on truck accessories
Optional throttle cable mounting bracket sold separately (FiTech part #70063)
Not CARB approved for emission-controlled vehicles; intended for retrofit or non-emission controlled applications

Note: Verify compatibility with your engine and transmission before ordering. Professional installation and tuning are recommended for optimal performance.