Complete System includes LS Engine Controller and available with optional integrated trans controller..From $1495.00 to $1995.00

Available for LS Cathedral or L92/LS3 port-style cylinder heads.

Self-Learning software makes for easy and simple performance upgrades like aggressive cam swaps!

Optional 102mm 750HP system for boosted, forced induction and big horsepower LS engines

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. FiTech’s Ultimate EFI is a complete Kit. Suitable for that junkyard 5.3 to a stroker 427, we have you covered! Check out the list of features and you will wonder why it's never been so simple to ditch that old factory hardware or top off that fresh long block. FiTech has taken the work out of getting your new or pull-out LS up and running in a flash.

Click On Links Below for more information and pricing on these FiTech Ultimate LS Induction Systems

70001 Ultimate LS Kit for LS1/LS2/LS6 -500 HP with self-learning engine controller

70002 Ultimate LS Kit for LS1/LS2/LS6 -500 HP with engine controller & GM 4L trans controller

70003 Ultimate LS Kit for LS1/LS2/LS6 -750 HP with self-learning engine controller

70004 Ultimate LS Kit for LS1/LS2/LS6 -750 HP with engine controller & GM 4L trans controller

70011 Ultimate LS Kit for LS3/L92 -500 HP with self-learning engine controller

70012 Ultimate LS Kit for LS3/L92 -500 HP with engine controller & GM 4L trans controller

70013 Ultimate LS Kit for LS3/L92 -750 HP with self-learning engine controller

70014 Ultimate LS Kit for LS3/L92 -750 HP with engine controller & GM 4L trans controller


FiTech Ultimate LS Induction System is designed for street and performance engine applications with a 1500-6500 rpm power-band. The Ultimate LS kits are designed to support either 500 hp or 750 hp to the flywheel and contains a 3 BAR MAP sensor for power adder applications that supports up to 30 PSI of boost. It has a high flow cable operated 92mm or 102MM inlet throttle body and 36lb or 55 lb flow-matched injectors. The 92mm or the 102 mm throttle body has parabolic inlet machining for smooth throttle transitions same as OE. The throttle body features progressive linkage pulley with a double return spring and an adjustable stop.The 750 hp and the 500hp kits are both available with the Transmission control option. The manifolds are designed with a 3mm construction tig welded, black anodized with embossed FiTech logo and CNC machined with o-ring gasket and either cathedral or square port applications. The kit comes with a self learning ECU with touch screen controller for easy setup and configuration and a programmable color touch screen handheld controller with a data logging feature. The Ultimate LS kit has a sequential fuel and spark control with individual cylinder trim. The system also comes with stainless oxygen sensor bung, target AFR and timing control if desired, two fan control outputs, 5V tach output driver for most tachometers and a speedometer output driver for most electric speedometers. The system is compatible with 24X and 58X crank sensors, LS1-LS3 cam sensors, and compatible with car and truck coils. Wiring the system is made easy with a custom wiring harness that uses existing factory coil packs and sub harness. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. Included are several timing curves that are each tailored for different camshafts, final drive gearing, and vehicle weight. The Ultimate LS system will allow for both EV, EV6, and truck injectors with interchangeable injector harnesses.

Engine Protection Feature:

The FiTech Ultimate LS Induction System is programmed with a limp home mode. Our features differ from competitors because it will not shut down your system, instead the ECU will compensate if a sensor fails. This means, that if for any reason a sensor fails, that sensor will receive either a default value or a simulated value. This is to ensure that the engine remains running in a safe and controlled manner so that you can get to a repair facility, or to your home to resolve the issue. Due to the compensation features of the ECU, the way to check if something is going wrong with your system is by the fault codes option on the main menu of your hand-held controller. The fault code comes up under OBD-II, diagnostic standard, but to the right of the code it will state which sensor is having the problem. Check our troubleshooting guide to solve the fault codes errors. A new feature programmed into our hand-held is a rev offset. This feature will protect the engine from long term abuse because it lowers your built in rev limiter to prevent over rev and possible engine damage during warm up. It will automatically turn the feature off once your engine reaches operating temperature.

Fuel Pump Pulse Width Modulation:

The fuel pump pulse width modulation or better known as PWM controls the speed of your pump from your hand-held. It can be set with four basic steps. To start plug your handheld controller into the ECU on the FiTech Throttle Body, turn your key 1 to the power system, but do not crank. 2 Next, go to main menu, scroll down to option 4: Go EFI Initial set-up, click the joystick to enter. 3 Now, go under option 1: Engine Setup. 4 Then, scroll down to option 6 (pump PWM/FCC) and select edit, press clear (CLR) and enter a new value. The lower the number the slower the pump will run. If you have a Fuel Command Center the best value to set this feature to is 40. If you are using the other three fuel delivery options keep the PWM value at 74.9. Once you enter the value you would like be sure to send to ECU by hitting enter on the joystick.

Click Here for complete Installation Instruction Manual

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FiTech Ultimate LS Induction Systems with Self-Learning ECU

Product Information

  • Brand: FiTech Fuel Injection
  • Product Number: FiTech Ultimate LS Induction Systems with Self-Learning ECU
  • $0.00