EFI Modules

Unleash the full potential of your LS engine with the Holley EFI Terminator X Max! Why stick to a junkyard ECU with complicated tuning when you can have seamless control and advanced, race-proven technology at an affordable price? The Terminator X Max boasts real-time fuel learning, high impedance injector drivers, a built-in 1bar MAP sensor, and four programmable inputs and outputs, perfect for electric fans, boost control solenoids, and more. With transmission control for 4L60E or 4L80E and Drive-By Wire Throttle Body control included, this kit comes pre-loaded with base maps for common LS engine setups, allowing for quick deployment. The 3.5" LCD touchscreen offers an intuitive calibration wizard plus tuning and gauge displays. Also, Holley EFI's top-tier, user-friendly software suite offers full laptop access for advanced tuning. Whether you're fine-tuning a budget build or crafting a high-octane race car, the Terminator X Max delivers the features and technology you need without breaking the bank!

Unleash the full potential of your LS engine with the HOLLEY EFI Terminator X MAX 24X/1X EV1 LS MPFI Kit with DBW Throttle Body and Transmission Control. Say goodbye to outdated junkyard ECUs with complex interfaces and embrace complete control of your engine with Holley EFI’s self-learning fuel strategies and race-winning technology. Designed for unbeatable performance at a budget-friendly price, Terminator X Max offers real-time fuel learning, high impedance injector drivers, an integrated 1-bar MAP sensor, and four programmable inputs and outputs – perfect for controlling electric fans, boost control solenoids, progressive nitrous control, and more. Engineered for GM LS1/LS6 engines with EV1 injectors and 4L60E/4L80E transmissions, it features drive-by-wire throttle body control and comes preset with base maps for common LS engine setups. This ultimate kit includes a 3.5" touch screen LCD handheld for easy tuning and gauge monitoring, plus Holley EFI’s user-friendly software suite for advanced tuning via laptop. Whether building a budget beater or a high-performance race car, the Terminator X MAX packs cutting-edge features and technology to elevate your ride without breaking the bank!

Introducing the Holley Sniper EFI 4150 Super Sniper 650! Transform your blow-thru carbureted turbo engine to EFI effortlessly. Ideal for lower horsepower applications, this model supports up to 650 HP with its four injector design. With built-in nitrous control, there's no need for a separate controller, simplifying your setup. Each system includes a USB to CAN tuning cable and free Sniper EFI Software for unparalleled engine control. Holley Sniper delivers powerful performance and is packed with features like advanced boost control, programmable air-fuel ratios, and user-friendly adjustability, making it the ultimate choice for enhancing your engine's capabilities.

Introducing the Holley Super Sniper EFI! Transform your blow-through carbureted turbo engine into a high-performance EFI beast with this cutting-edge system. Designed for up to 650 HP, it features four powerful injectors ideal for lower horsepower applications with power adders or additional sensor needs. The Super Sniper boasts built-in nitrous control, eliminating the need for an additional controller. Plus, enjoy limitless engine control with the free Sniper EFI Software and a USB to CAN tuning cable included. Take your engine to the next level with Holley’s superior performance technology!

Introducing Holley Super Sniper EFI! Transform your blow-thru carbureted turbo engine to EFI effortlessly with the Holley Super Sniper 4150 EFI system. Equipped with 8, 100LB/HR fuel injectors, it supports up to a whopping 1250 HP on forced induction or dry nitrous applications. Even if your setup isn't pushing those numbers, there's a 650 HP four-injector version for lower power needs with a power adder or extra sensor inputs. Plus, no need for a separate nitrous controller—full nitrous control is built right in! Each Super Sniper EFI system includes a USB to CAN tuning cable and free Sniper EFI Software, granting you limitless engine control.

Unleash the full potential of your Chevy LS engine with the Holley Terminator X Engine Management System! Superior to any junkyard ECU, this advanced system offers unparalleled control with its self-learning fuel strategies and race-proven Holley EFI technology, all at a budget-friendly price. The Terminator X is equipped with real-time fuel learning, high impedance injector drivers, an integrated 1bar MAP sensor, and four programmable inputs and outputs perfect for customizing with electric fans, boost control solenoids, nitrous control, and more. Preloaded with base maps for common LS engine configurations, it ensures a quick start to hit the road or track. The 3.5" touch screen LCD handheld provides an intuitive calibration wizard and tuning options, complemented by Holley EFI's user-friendly software suite for expert tuning via laptop. Whether you're crafting a budget build or a high-powered race machine, the Terminator X delivers the cutting-edge features you need without breaking the bank!

Take control of your LS engine with the Holley Terminator X Engine Management System! Why settle for a junkyard ECU with a cumbersome tuning interface when you can have complete command over your engine with self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price? The Terminator X boasts real-time fuel learning, high impedance injector drivers, an integrated 1-bar MAP sensor, and 4 programmable inputs and outputs ideal for electric fans, boost control solenoids, progressive nitrous control, and more. Preloaded with base maps for common LS engine combinations, you can swiftly move from the garage to the road or track. The 3.5" touchscreen LCD handheld offers an easy-to-use calibration wizard along with tuning and gauge display functions. The package also includes Holley EFI's industry-leading, user-friendly software suite for full laptop access by advanced users. Whether you’re crafting a budget-friendly beater or a boosted race car, the Terminator X provides the features and technology you need without breaking the bank!

Unleash the full potential of your LS engine with the Holley Terminator X Engine Management System! Why settle for a mediocre, junkyard ECU when you can harness the power of advanced, race-winning technology at a budget-friendly price? The Terminator X delivers unmatched control with self-learning fuel strategies, optimized for up to 8 injectors and coils. It features real-time fuel learning, high impedance injector drivers, and an integrated 1bar MAP sensor. With 4 programmable inputs and outputs, it's ideal for managing electric fans, boost control solenoids, and more. Preloaded base maps for common LS setups ensure a fast and smooth start. The included 3.5" touchscreen LCD and industry-leading software make tuning a breeze for both beginners and advanced users. Whether you're customizing a budget-friendly street build or a high-performance track machine, the Terminator X has the features you need without breaking the bank!

Unleash the full potential of your LS engine with the Holley EFI Terminator X Max 58X/4X EV6 LS MPFI Kit with Transmission Control! Say goodbye to outdated, cumbersome ECUs and experience superior control, self-learning fuel strategies, and race-winning technology at an unbeatable price. The Terminator X Max offers real-time fuel learning, high impedance injector drivers, an integrated 1bar MAP sensor, and four programmable inputs and outputs, perfect for electric fans, boost control solenoids, and progressive nitrous control. It also includes 4L60E or 4L80E Transmission control and comes loaded with base maps for common LS engine combinations. Get up and running quickly with the easy-to-use 3.5" touch screen LCD handheld and the comprehensive software suite for advanced tuning. Whether you're building a budget-friendly daily driver or a high-performance race car, the Terminator X Max is equipped with the features and technology you need without breaking the bank!

Take control of your LS engine with the Terminator X Max! Why settle for a junkyard ECU with a cumbersome tuning interface when you can have complete command over your engine, self-learning fuel strategies, and the race-winning technology of Holley EFI—all at a budget-friendly price? The Terminator X Max boasts real-time fuel learning, high impedance injector drivers, an integrated 1-bar MAP sensor, and 4 programmable inputs and outputs, perfect for managing electric fans, boost control solenoids, and progressive nitrous systems. With part number 550-916, enjoy seamless 4L60E or 4L80E transmission control. Get out of the garage and onto the road or track quickly with preloaded base maps for common LS engine setups. The 3.5" touch screen LCD offers an intuitive calibration wizard, along with tuning and gauge display functions. Harness Holley EFI's industry-leading software suite for full laptop access and advanced tuning capabilities. Whether you’re piecing together a budget build or a high-powered race machine, the Terminator X Max delivers the features and technology you need at a price that keeps you on budget!

Take control of your LS engine with the Holley Terminator X Max! Why settle for a junkyard ECU when you can have complete command of your engine with self-learning fuel strategies and the race-winning technology of Holley EFI—all at a budget-friendly price? This advanced system features real-time fuel learning, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs, perfect for electric fans, boost control solenoids, and nitrous control. Part number 550-927 includes 4L60E or 4L80E Transmission control and Drive-By Wire Throttle Body control. With base maps for common LS engine combos, you’ll be ready to hit the road or track in no time. The 3.5" LCD touchscreen provides an easy-to-use calibration wizard, tuning, and gauge display functions, and you get access to Holley EFI's comprehensive software suite for full laptop tuning. Whether building a budget beater or a boosted race car, Terminator X Max delivers the features and technology you need without breaking the bank!

Looking for a plug-and-play alternative for your stock or built late model factory EFI engine? Need a replacement ECU for your older Holley C950? Holley EFI has you covered with the HP EFI ECU Engine Management System. Designed for compatibility with popular factory EFI engines, this system serves as an excellent substitute for factory ECU and harness setups or as a direct replacement for your C950 ECU. The HP EFI ECU allows precise control over your engine's fuel and ignition systems, while also offering additional features for managing nitrous, boost, or water methanol injection. Upgrade to superior performance and reliability with Holley EFI.

Unleash the full potential of your LS engine with the Holley Terminator X MAX Engine Management System! Say goodbye to subpar junkyard ECUs and embrace cutting-edge, race-proven technology at an affordable price. This system offers user-friendly control, self-learning fuel strategies, and seamless tuning capabilities, all packed into a sleek kit. The Terminator X MAX is designed to optimally manage your GM 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with a Drive-By-Wire Throttle Body. With eight high-impedance injectors and coils, real-time fuel map learning, and a built-in 1bar MAP sensor, you’ll achieve precision performance. Its four programmable inputs and outputs are perfect for customizing with accessories like electric fans, boost control solenoids, and nitrous systems. Plus, the easy-to-use 3.5" touchscreen and Holley EFI software make tuning a breeze for both novices and experienced users. Ready with base maps for common LS builds, the Terminator X MAX gets you on the track or road faster. Boost your engine's power without breaking the bank!

Take control of your LS engine with the Holley Terminator X Max! Why settle for a junkyard ECU with a complicated tuning interface when you can have complete mastery over your engine? Featuring self-learning fuel strategies and the proven, race-winning technology of Holley EFI, all at a budget-friendly price! The Terminator X Max boasts real-time fuel learning, high-impedance injector drivers, an integrated 1-bar MAP sensor, and 4 programmable inputs and outputs perfect for electric fans, boost control solenoids, progressive nitrous control, and more. Part number 550-926 also offers control for 4L60E or 4L80E transmissions and Drive-By-Wire Throttle Bodies. Preloaded with base maps for popular LS engine setups, this system gets you out of the garage and onto the road or track quickly. The 3.5" touch screen LCD handheld provides an intuitive calibration wizard as well as tuning and display functions. Also included is Holley EFI's industry-leading, user-friendly software suite for full laptop access by advanced users. Whether you're building a budget-friendly beater or a boosted race car, the Terminator X MAX delivers the features and technology you need at a price that won’t break the bank!

Unleash the full potential of your LS engine with the Holley Terminator X Engine Management System! Say goodbye to outdated junkyard ECUs and their clunky interfaces. With Terminator X, experience total command over your engine, thanks to its self-learning fuel strategies and Holley's race-winning technology—all at an unbeatable price. This system boasts real-time fuel learning, high impedance injector drivers, an on-board 1-bar MAP sensor, and 4 programmable inputs and outputs, perfect for electric fans, boost control solenoids, and more. Pre-loaded with base maps for common LS configurations, the Terminator X gets you from garage to road or track in no time. These kits come with a USB/CAN tuning cable and require the free Terminator X Software for initial setup, offering multiple calibrations for both naturally aspirated and boosted engines. Whether you're crafting a budget ride or a high-performance race car, the Holley Terminator X has you covered with the features and advanced technology you need.

Unleash the full potential of your LS engine with the Holley Terminator X Max Engine Management System! Say goodbye to the limitations of a basic junkyard ECU and embrace the ultimate control, performance, and precision offered by Holley EFI’s advanced technology. The Terminator X Max is designed to deliver seamless engine management with self-learning fuel strategies, real-time fuel adjustments, and race-proven features at a fraction of the cost. Equipped with high impedance injector drivers, an onboard 1 bar MAP sensor, and 4 programmable inputs and outputs, it's perfect for managing electric fans, boost control solenoids, progressive nitrous control, and more. The kit includes drive-by-wire throttle body control and comes with pre-loaded base maps for common LS engine configurations, ensuring you hit the road or track with minimal hassle. With an intuitive 3.5" touchscreen LCD handheld for easy calibration and tuning, plus Holley EFI's user-friendly software for more advanced setups, the Terminator X Max is built for everyone from budget builders to seasoned racers. Transform your ride without breaking the bank and experience superior engine control with Holley EFI.