Description
FiTech Retro LS Port 750 HP EFI Classic Gold System with Cast LS3 Intake
Transform your GM LS3 engine with the FiTech Retro LS Port 750 HP Multi-Port EFI System, featuring a cast aluminum intake manifold, Classic Gold 4150 throttle body, and integrated transmission control.
Product Overview
The FiTech 37003 Retro LS Port EFI System combines classic muscle car aesthetics with cutting-edge multi-port electronic fuel injection technology. Designed specifically for GM LS3 and rectangular port LS engines, this comprehensive kit features a natural cast aluminum intake manifold paired with a striking Classic Gold powder-coated 4150 flange 4-blade throttle body. Capable of supporting up to 750 horsepower on gasoline and fully compatible with boost or nitrous applications, it delivers optimal fuel atomization and throttle response for high-performance street and track builds.
Equipped with an advanced self-learning ECU that supports both 24-tooth and 58-tooth reluctor wheels, the system eliminates the need for complex laptop tuning. The ECU also includes built-in electronic transmission control for GM 4L60E, 4L65E, 4L70E, 4L80E, and 4L85E transmissions, streamlining your powertrain wiring and management. Handheld touchscreen display, dual Bosch wideband O2 sensors, 55 lb/hr fuel injectors, and anodized billet fuel rails make this an all-in-one LS conversion solution.
Key Features
- ☑ High-Horsepower Capability: Supports up to 750 HP on gasoline; fully boost and nitrous compatible.
- ☑ Cast LS3 Intake Manifold: Durable aluminum intake manifold designed for LS3 rectangular port cylinder heads.
- ☑ Classic Gold Throttle Body: Powder-coated 4150 flange 4-blade throttle body blending vintage styling with modern precision.
- ☑ Multi-Port Injection Precision: 8x 55 lb/hr injectors mounted in black anodized billet aluminum fuel rails.
- ☑ Integrated Transmission Control: Plug-and-play control for GM 4L60E, 4L65E, 4L70E, 4L80E, and 4L85E automatic transmissions.
- ☑ Self-Learning EFI ECU: Advanced Speed Density architecture compatible with 24x and 58x reluctor signals for quick self-calibration.
- ☑ Dual Wideband Monitoring: Includes two Bosch wideband oxygen sensors with bungs for precise bank-to-bank fuel control.
Technical Specifications
| Brand | FiTech Fuel Injection |
|---|---|
| Part Number | 37003 |
| Injection Style | Multi-Port Electronic Fuel Injection |
| Cylinder Head Style | LS3 / Rectangular Port |
| Maximum Horsepower | 750 HP (Gasoline) |
| Throttle Body Finish | Classic Gold Powder Coat |
| Throttle Body Flange | 4150 Square Bore (4-Blade) |
| Intake Manifold Material | Cast Aluminum (Natural Finish) |
| Injector Rating | 55 lb/hr (8 Injectors Included) |
| Fuel Rail Material | Billet Aluminum (Black Anodized) |
| Transmission Control | GM 4L60E, 4L65E, 4L70E, 4L80E, 4L85E |
| Reluctor Wheel Compatibility | 24-Tooth and 58-Tooth |
| Fuel Pressure Regulator | Built-in Adjustable Regulator Included |
What’s Included in the Box
- Cast Aluminum Rectangular Port LS3 Intake Manifold
- Classic Gold 4150 Flange 4-Blade Throttle Body
- Black Anodized Billet Aluminum Fuel Rails
- 8 x 55 lb/hr High-Impedance Fuel Injectors
- Self-Tuning ECU with Built-In Transmission Control Harness
- Handheld Touchscreen Controller & Mounting Cable
- Dual Bosch Wideband O2 Sensors & Weld-In Bungs
- Fuel Pressure Regulator, -6 AN / -8 AN Fittings & Engine Wiring Harness
- Intake Gaskets & Mounting Hardware
Engineered for track performance and street reliability, FiTech fuel injection systems set the benchmark for modern retro-fit LS power. Order your FiTech 37003 kit from JP Racing today for expert UK technical support, competitive pricing, and fast UK dispatch.
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