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Vehicle Info Needed70050 Ultimate LS ECU & Harness Induction System Standalone Kit
Ships on Sep 08, 2026
Lowest Price Guarantee- LS ECU
- Wiring Harness
- Hand-held Controller
- Windshield Mount
- 3 BAR MAP Sensor
- O2 Sensor
- Oxygen Sensor Bung Kit
- 2 Fan Outputs
If you’re considering utilizing a factory intake, injectors, and cable-operated throttle body, FiTech’s Ultimate LS standalone self-learning ECUs will get your engine ready for optimal performance. This self-learning Ultimate LS ECU is the best solution for a standalone LS swap and replaces the OEM computer and harness. This kit is dedicated to LS or similar engines with crank and cam sensors. The Ultimate LS standalone kit will self-learn to most cam swaps. Usually, only very large cam grinds will require additional tuning in the system. Easily tuned for even the most novice tuner, this kit includes a touch-screen controller for easy setup and configuration.
Application:
- LS or similar engines with crank and cam sensors.
- Small Block V8 GEN. III/IV LS-based Chevrolet street and performance engines.
- Contains a 3 BAR MAP sensor for power adder applications that supports up to 30 PSI of boost.
- Note: This kit does not work with drive-by-wire throttle bodies and variable valve timing. These engines can be modified to remove these components.
Features:
- Self-learning ECU with touch screen controller for easy setup and configuration.
- Sequential fuel and spark control with individual cylinder trim.
- 3 BAR MAP sensor automatically detects up to 30 psi boost.
- Stainless O2 Sensor bung (clamp or weld on).
- 24X and 58X crank and cam compatible.
- Two programmable fan control outputs.
- Tach output driver for most tachometers (5V).
- Output driver for most speedometers.
- Compatible with car and truck coils.
- On-the-fly programmable target AFR and timing (if desired).
- Fuel pump relay output.
- Custom wire harness (uses factory coil pack sub harness).
- Knock sensor control.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
The Ultimate Fuel Injection System for GM LS-Based Engines
FiTech's Ultimate LS EFI Induction Systems are self-tuning electronic fuel injection systems for LS-based engines, designed for the do-it-yourself hot-rodder or professional tuner. These systems are a complete kit with everything needed to complete the induction system of the popular GM LS engine.
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Transform your LS-powered build with the next evolution in fuel delivery technology — the FiTech Ultimate LS EFI Induction Systems. Designed for everyone from weekend builders to seasoned performance tuners, these systems combine cutting-edge EFI control with bolt-on convenience, giving your engine smoother power delivery, improved fuel economy, and rock-solid reliability. Whether you’re daily driving, cruising, or competing on the strip, the performance and versatility of this system are clear from the first start.
The heart of the upgrade is the fitech ultimate ls controller, a fully programmable engine management system optimized specifically for LS architectures. Its adaptive fuel and spark control automatically adjusts to changes in conditions and power adders, so you spend less time dialing in and more time enjoying responsive throttle and confident acceleration. With on-screen tuning and built-in data logging capability, you can fine-tune parameters easily without external gadgets or guesswork.
One of the biggest advantages of an efi for ls engine is seamless drivability in every situation. Cold starts become reliable, idle transitions smooth, and throttle response sharp — eliminating common carburetor headaches like stumble or hesitation. For late-model swaps and retrofits especially, this system brings modern control to older chassis without compromising character.
Installation is straightforward with quality hardware and detailed instructions included, making it achievable for experienced DIYers and professional shops alike. From street cruisers to high-output performance builds, this ls efi kit gives you a complete, dependable induction solution that enhances power, efficiency, and overall engine confidence — a smart upgrade for any LS enthusiast.
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