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#52171004
FiTech 71004 Ultimate LS EFI 750HP Fuel Injection Systems
$2,314.79
/kit
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$2,571.99
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Product Summary
Universal Fit, Multi-port Injection Style, 1000 CFM CFM
Rebates Available
See rebate detailsKey Specs
| MFG. Part # | 71004 |
| Injection Style | Multi-port |
| Injector Size | 55 lbs./hr. |
| Max Horsepower Rating | 750 |
| ECM Included | Yes |
Need To Know
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FiTech 71004 Details
The LS EFI 750HP fuel injection systems by Fitech are hands down the best on the market! Many of the parts for these systems have been fabricated, including the low-profile 102mm billet throttle body, high-volume billet fuel rails, and an intake manifold with 1,500 to 6,500 rpm powerband and 3mm construction.
System includes sequential spark and fuel control mates 36 lbs./hr. injectors, a plug-and-play wiring harness, and a color touchscreen self-learning ECU. This allows for programing two fan control outputs, most tach and speedometer output drivers, and target AFR and timing on the fly. A suction cup mounting bracket puts the controllers at your fingertips and allows for impressive visual aids.
Optional transmission control feature is suitable for 4L60, 4L65, 4L70, or 4L80 GM transmissions. The FiTech LS EFI 500HP fuel injection systems with trans controller provides great power and performance without breaking the bank.
- Ultimate LS1/LS2/LS6 750 HP W/ Trans Control + In-line Fuel Pump Master Kit
- Programmable touch-screen hand-held controller with data log features
- 3-bar MAP sensor automatically detects up to 30 psi boost
- AN fittings and fuel crossover
- 24X and 58X crank and cam-compatible and works with custom cams
- Black anodized aluminum parts for style and corrosion resistance
- High-flow, cable-operated throttle body
- Dual Bosch wideband with dual trim controlled
- Knock sensor control
- Stainless oxygen sensor bung
- Compatible with car and truck coils
- Designed for applications making at least 6 inches of vacuum at idle
- Includes tran control
FiTech’s black anodized Ultimate LS1/LS2/LS6 750HP Kit with trans control combined with an Inline Fuel Pump fuel delivery kit are a complete self-tuning induction systems for LS engines designed for the do-it-yourself hot rodder to the professional EFI tuner! This system is ready to go with everything needed to complete the induction system of your LS engine and get you on the road easily and faster than any system on the market today. Forget sourcing mismatched parts and cutting and splicing old harnesses and re-flashed ECU’s from “Craigs List” tuners.
The Inline Fuel Pump Fuel Delivery Kit includes an EFI grade 255 L/PH inline external fuel pump that is suitable for engines making up to 600HP. (Note that some of our EFI kits are limited to less than 750HP due to maximum usable injector sizes). This kit also includes 20-feet of EFI grade fuel hose suitable for both the inlet and return lines between the fuel tank and the engine. The kit includes two billet fuel filters. The filters include a 100-micron pre-filter and a 30-micron post filter.
- Includes tran control
FiTech’s black anodized Ultimate LS1/LS2/LS6 750HP Kit with trans control combined with an Inline Fuel Pump fuel delivery kit are a complete self-tuning induction systems for LS engines designed for the do-it-yourself hot rodder to the professional EFI tuner! This system is ready to go with everything needed to complete the induction system of your LS engine and get you on the road easily and faster than any system on the market today. Forget sourcing mismatched parts and cutting and splicing old harnesses and re-flashed ECU’s from “Craigs List” tuners.
The Inline Fuel Pump Fuel Delivery Kit includes an EFI grade 255 L/PH inline external fuel pump that is suitable for engines making up to 600HP. (Note that some of our EFI kits are limited to less than 750HP due to maximum usable injector sizes). This kit also includes 20-feet of EFI grade fuel hose suitable for both the inlet and return lines between the fuel tank and the engine. The kit includes two billet fuel filters. The filters include a 100-micron pre-filter and a 30-micron post filter.
Rebates
FiTech 10% Off Select Parts Labor Day Sale 2026
FiTech Fuel Injection is pleased to announce our Labor Day Specials, running from September 1, 2026, through September 30, 2026. For a limited time, customers can save over $350 on Ultra Port EFI systems and EFI Master Kits, making it the perfect opportunity to upgrade to modern fuel injection with improved performance and drivability. 10% off applicable parts. Sale prices are applicable only to purchases made within the specified sale period, from September 1, 2026, to September 30, 2026. No rainchecks or exceptions will be provided. Sale price is valid through September 30. Regular MAP Pricing will be reinforced on October 1, 2026. This sale cannot be combined with any other offers, discounts, or promotions. Co-ops will be honored.
Guides & Documents
CARB Warning
For race/ off road use or for use on pre-1966 vehicles.
CARB Warning
For race/ off road use or for use on pre-1966 vehicles.
FiTech 71004 Specifications
FiTech 71004 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 71004 |
| Brand | FiTech |
| Injection Style | Multi-port |
| Injector Size | 55 lbs./hr. |
| Max Horsepower Rating | 750 |
| ECM Included | Yes |
| GENERAL | |
| Fuel Injection System Type | Multi-port Throttle Body |
| CFM | 1000 CFM |
| User Tunable | Yes |
| Self Tuning | Yes |
| Injectors Included | Yes |
| Intake Manifold Included | Yes |
| Intake Section Included | Complete |
| Metering Style | Speed density (Map-N) or speed throttle (Alpha-N) |
| EGR | No |
| Throttle Body Included | Yes |
| Throttle Body Material | Billet Aluminum |
| Throttle Body Finish | Anodized |
| Intake Material | Aluminum |
| Intake Finish | Anodized |
| Venturi Quantity | 1 |
| Fuel Pump Included | Yes |
| Fuel Rails Included | Yes |
| Calibration Module Included | Yes |
| Wiring Harness Included | Yes |
| Fuel Pressure Regulator Included | No |
| Distributor Included | No |
| MAP Sensor Included | Yes |
| IAC Motor Included | Yes |
| IAT Sensor Included | Yes |
| TPS Sensor Included | Yes |
| Use with Power Adder | No |
| Venturi Diameter | 102.00mm |
| Flow Rating | 340 |
| Notes | Kit includes 50001 inline fuel pump kit. |
| GTIN Code | 854549007491 |
| Sold in Quantity | Kit |
| Transmission Controller Included | Yes |
| Multi-Port Fuel Rails Included | Yes |
| Timing Control Compatible | Yes |
Ratings & Reviews
Ratings & Reviews
Questions & Answers
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Fitment
Fitment
2004 Buick Rainier
GM LM4
2006-2007 Cadillac CTS
GM LS2
2002-2011 Cadillac Escalade
GM LQ9
2003-2006 Cadillac Escalade ESV
GM LQ9
2002-2006 Cadillac Escalade EXT
GM LQ9
1998-2002 Chevy Camaro
GM LS1
1997-2004 Chevy Corvette
GM LS1
2005-2007 Chevy Corvette
GM LS2
2007 Chevy Silverado 1500 HD
GM LQ9
2005 Chevy Silverado 2500
GM LQ9
2003-2004 Chevy SSR
GM LM4
2006-2009 Chevy Trailblazer
GM LS2
2002-2009 GMC Envoy
GM LM4
2002-2006 GMC Envoy XL
GM LM4
2004-2005 GMC Envoy XUV
GM LM4
1998-2002 Pontiac Firebird
GM LS1
2004 Pontiac GTO
GM LS1
2005-2006 Pontiac GTO
GM LS2


