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FiTech Ultimate LS 1,000 HP EFI Short Cathedral Intake Fuel Injection Master Kits 78631 1000 System With Kit

SKU: FIF78631

Fuel Injection Systems

FiTech Ultimate LS 1,000 HP EFI Short Cathedral Intake Fuel Injection Master Kits 78631 1000 System With Kit

SKU: FIF78631

Fuel Injection Systems
A$6,485.91
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Finishing your LS swap is now easier with FiTech Ultimate LS systems. Designed as a complete induction and EFI system for your LS engine and available with or without transmission control, FiTech offers several master kits supplied with fuel delivery systems, as well as their Go Spark LS3 performance coils to support 500, 750, or 1,000 hp.

FiTech Ultimate LS 1,000 hp EFI short cathedral intake fuel injection master kits package either a 440 lph in-tank pump for tanks with a depth of 6 to 15 in. or an in-tank dual pump module (two 340 lph pumps) that is ideal for fuel cells or custom tanks. Along with the fuel delivery, kits also contain a Go Fuel regulator—Tight Fit with gauge that supports up to 1,000 hp or FiTech's High Horsepower with gauge that supports up to 2,000 hp. Both are crafted from billet aluminum and feature -6 ORB ports and a vacuum/boost port. Completing these kits is your choice of FiTech Go-Spark LS coil packs to provide a fresh jolt of energy. Available with or without a built-in LED that flashes when the coils fire, the coils bolt-in place of the originals and accept the sealed, locking connector and plug wire terminal for a simple upgrade, delivering optimum output with a quality fit and reliability. Select the FiTech Ultimate LS 1000 kit for your engine with the options you prefer.

FiTech Ultimate LS 1,000 hp kits feature:

* Intake manifold will fit cathedral port LS1/LS2/LS6 heads
* Fabricated 3mm thick aluminum sheet metal and TIG welded
* Cast, cable activated billet aluminum 102mm throttle body
* Handheld controller with color touch screen and cable
* Windshield mount for touch screen controller
* LS ECU
* 80 lb./hr. injectors
* High volume billet fuel rails
* Self-learning technology maintains your target air/fuel ratio settings
* Sequential fuel and spark control with individual cylinder trim
* Connects to 24x and 58x cam sensors
* Knock sensor control connects to factory sensors
* 3-Bar MAP sensor for boosted applications up to 30 psi
* Tach output driver works with most tachometers
* Two programmable electric fan outputs
* Supplied with WBO2 sensors
* Custom wiring harness for a direct plug-in installation
* Systems with transmission control allows shift point and firmness adjustments on 4L60/65/80/85 GM transmissions

Part Type

Fuel Injection Systems

Data: v4.2 - Upd: 2026-10-02 04:29:00

Specifications

Product Attributes - Brand
FiTech Fuel Injection
Product Attributes - Manufacturer's Part Number
78631
Product Attributes - Part Type
Fuel Injection Systems
Product Attributes - Product Line
FiTech Ultimate LS 1,000 HP EFI Short Cathedral Intake Fuel Injection Master Kits
Product Attributes - UPC
812061039505
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Fuel Injection System Type
Multi-port Throttle Body
Product Attributes - Maximum Horsepower with Gas
1,000
Product Attributes - Timing Control Compatible
Yes
Product Attributes - ECM Included
Yes
Product Attributes - Self Tuning
Yes
Product Attributes - User Tunable
Yes
Product Attributes - Fuel System Included
In-tank fuel pump module, return
Product Attributes - Ignition System Included
Coil packs
Product Attributes - Power Distribution Included
None
Product Attributes - User Interface Included
4.5 in. display
Product Attributes - EGR
No
Product Attributes - Transmission Controller Included
Yes
Product Attributes - Metering Style
Speed density
Product Attributes - Intake Material
Aluminum
Product Attributes - Intake Color
Black
Product Attributes - Multi-Port Fuel Rails Included
Yes
Product Attributes - Throttle Body Included
Yes
Product Attributes - Throttle Body Mounting Flange
GM LS2 4-bolt
Product Attributes - Venturi Quantity
1
Product Attributes - Venturi Diameter (mm)
102.00mm
Product Attributes - Airflow Rate (cfm)
1,450 cfm
Product Attributes - Throttle Body Material
Cast aluminum
Product Attributes - Throttle Body Color
Black
Product Attributes - Injectors Included
Yes
Product Attributes - Injector Size (lbs/hr)
80 lbs./hr.
Product Attributes - Calibration Module Included
Yes
Product Attributes - Wiring Harness Included
Yes
Product Attributes - Oxygen Sensor Included
Yes
Product Attributes - Fuel Pressure Regulator Included
Yes
Product Attributes - MAP Sensor Included
Yes
Product Attributes - IAT Sensor Included
Yes
Product Attributes - TPS Sensor Included
Yes
Product Attributes - IAC Motor Included
Yes
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Fuel injection system includes: in-tank fuel pump 1000 hp module, regulator with pressure gauge, 8 LS3 style ignition coils.

Reference Information

Brand Name/s Fitech Fuel Injection
StreetFX SKU fif78631
SFX Item ID 5178092
Supplier Item Code 5178092
Manufacturer SKU 78631
Manufacturer UPC 812061039505

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2019
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2019
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2019
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2019
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Fuel TypeALCOHOL
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Fuel TypeFLEX
    Cylinder Head TypeStock configuration
    Application NotesE85 requires 30 percent more fuel to equal the same power level, confirm your EFI system is capable of flowing the extra E85 to reach horsepower goals.
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Fuel TypeGAS
    Cylinder Head TypeStock configuration
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Fuel TypeMETHANOL
    Cylinder Head TypeStock configuration

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