FiTech Ultimate LS 750HP EFI System with Short Cathedral Intake & Transmission Control

Description

FiTech Ultimate LS 750HP EFI System with Short Cathedral Intake & Transmission Control (Part No: 70004)

Transform your LS-based project with the ultimate bolt-on electronic fuel injection upgrade. The FiTech Ultimate LS 750HP EFI Kit (70004) is a comprehensive, self-tuning induction system engineered for both DIY hot rodders and professional EFI tuners. Whether you are dropping a junkyard 5.3-litre into a classic build or topping off a fresh 427 stroker, this kit provides everything you need to ditch outdated factory hardware, mismatched parts, and complex wiring harnesses.

Complete Self-Learning EFI for Cathedral Port LS Engines

Designed specifically for Cathedral Port LS1, LS2, and LS6 heads (Gen III/IV Chevrolet V8 engines), this setup is rated to support up to an impressive 750 horsepower at the flywheel. The kit centres around a fabricated 3mm thick TIG-welded aluminium sheet metal intake manifold, finished in a sleek black anodised coating. Standing at a low-profile 6.5 inches tall, it provides excellent bonnet clearance whilst delivering a robust 1500–6500 RPM power band.

Built-in Electronic Transmission Control

Take total control of your drivetrain. This kit includes integrated electronic transmission management tailored for GM electronically controlled automatic gearboxes. The Ultimate LS ECU allows you to effortlessly dial in shift points, shift firmness, and downshift mapping. It is fully compatible with GM 4L60, 4L65, 4L80, and 4L85 transmissions. If you are running a manual or non-electronic gearbox, simply leave the sub-harness disconnected—it’s entirely versatile.

Boost-Ready Performance and Precision Control

Looking to add forced induction? The FiTech 70004 kit comes standard with a 3 BAR MAP sensor capable of reading up to 30 PSI of boost, making it perfectly suited for superchargers, turbochargers, and nitrous oxide applications. Fuel delivery is handled seamlessly by high-flow 55 lb/hr matched injectors and billet aluminium fuel rails with -6 AN fittings, ensuring your engine never runs lean.

Key Features & Specifications:

• Engine Compatibility: Fits 4.8L, 5.3L, 5.7L, and 6.0L LS engines with Cathedral Port heads (including LR4, L33, LM7, LS1, LS2, LS6, and LQ4 blocks).

• Throttle Body: High-flowing 102mm billet aluminium cable-operated throttle body.

• Intake Manifold: 3mm thick fabricated aluminium, TIG-welded, with a stealthy black anodised finish.

• ECU & Tuning: Self-learning ECU featuring sequential fuel and spark control. Includes a full-colour touch screen controller with a windscreen mount for easy on-the-fly tuning.

• Sensors Included: Dual Bosch wideband O2 sensors (with clamp/weld-on bungs), 3 BAR MAP, TPS, IAC, and IAT sensors.

• Harness: Custom plug-and-play primary wiring harness (utilises the factory coil pack sub-harness).

• Extra Outputs: Two programmable electric cooling fan controls, a tachometer output driver (5V), speedometer output, and fuel pump relay output.

• Manufacturers Warranty: 3 years, with full technical support when purchased from JP Racing as an approved distributor

• Part Number: 70004

• Installation: Click to Download

Take the headache out of your LS swap and maximise your horsepower with the FiTech 70004 Ultimate LS EFI Kit. With its self-learning technology and complete hardware package, getting your engine roaring to life has never been simpler.

(Note: This system is designed for retrofit into older vehicles that do not require emissions controls. It is not approved for use on pollution-controlled vehicles).