EFI Modules

Take control of your LS engine with the Holley Terminator X Max! Why settle for a junkyard ECU with a cumbersome tuning interface when you can have complete command over your engine? Benefit from 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 1bar MAP sensor, and 4 programmable inputs and outputs, perfect for electric fans, boost control solenoids, progressive nitrous control, and more. This kit includes 4L60E or 4L80E transmission control, providing flexibility for your build. Supplied with base maps for common LS engine combinations, these kits come with a USB/CAN tuning cable and require free Terminator X Software for initial setup. Whether you're crafting a budget beater or a boosted race car, unleash the full potential of your engine with Terminator X Max!

Take control of your engine with the Holley EFI Terminator X Universal MPFI Kit! Why settle for a factory ECU with a cumbersome tuning interface when you can have ultimate control, self-learning fuel strategies, and Holley EFI's proven, race-winning technology at a budget-friendly price? The Terminator X features 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, progressive nitrous, and more. With base maps for common V8 engine setups, get on the road or track faster. The included 3.5" touchscreen LCD handheld offers an easy calibration wizard, tuning, and gauge display functions. Plus, Holley EFI's leading software suite allows full laptop access for advanced users. Whether building a budget ride or a boosted race car, Terminator X has the features and technology you need without breaking the bank.

The Holley EFI Transbrake Input Protection Module is an essential device designed to safeguard your ECU input from harmful flyback voltage. By allowing direct connection to the +12V side of the transbrake solenoid, this module effectively prevents ECU damage over time, ensuring reliability and longevity. Protect your investment with the trusted quality of Holley EFI.

Introducing the Holley EFI Coolant Temperature Sensor, an essential component for your Holley EFI and Commander 950 systems. This top-quality sensor ensures precise temperature monitoring, optimizing your engine's performance and efficiency. Trusted by automotive enthusiasts, Holley EFI delivers reliability and accuracy in every product. Upgrade your system with the ultimate coolant temperature sensor and experience the difference.

Introducing the Holley EFI Air Temperature Sensor, the essential replacement component for your Commander 950 or Holley EFI system. Engineered by the renowned brand Holley EFI, this sensor ensures precise air temperature measurements, optimizing your engine's performance and reliability. Lightweight yet robust, the Holley EFI Air Temperature Sensor is your go-to choice for maintaining peak efficiency and accuracy in your vehicle’s EFI system. Whether you’re seeking top-tier performance or reliable replacements, trust Holley EFI to deliver excellence. Upgrade your engine management with confidence today!

Rigidly mounting pressure transducers directly to your engine can lead to inaccuracies and potential damage. Meet the Holley EFI 1/8 NPT Sensor Block! Specifically designed for compatibility with all transducers featuring 1/8 NPT male threads and a body/hex diameter of 7/8" or smaller, this sensor block offers a secure and organized solution for mounting multiple sensors. With its sturdy military-grade 2024 Aluminum construction, this lightweight and optimized design ensures durability while helping to minimize vibrations and heat interference. Keep your engine bay clean and efficient with this anodized black sensor block, expertly etched with the Holley EFI logo.

Introducing the Holley EFI 1600 PSI Stainless Pressure Sensor—precision engineering for the demands of high-performance applications. Crafted from durable stainless steel, this sensor offers a reliable pressure range of 0-1600 PSI, ensuring accurate readings and optimal performance. With a compact body diameter of .875" and a length of 2.558", it features an inlet size of 1/8 inch NPT, a linear voltage output of .5 - 4.5 volts, and requires a reference voltage of 5 volts. The Holley EFI Pressure Sensor is perfect for those seeking precision and reliability in engine management systems. Part Number: 554-104.

Enhance your vehicle's performance with the Holley EFI 7 Bar Map Sensor. Engineered with high-quality stainless steel construction, this sensor ensures durability and reliability. It features a linear voltage output of 0.5-4.5 volts, providing precise readings for custom configurations. The package includes a mating connector for easy installation. Trust Holley EFI to deliver premium performance with part number 554-135. Perfect for enthusiasts looking to optimize engine management systems. Emission Code 5 approved.

Introducing the Holley EFI 3.5 Bar Map Sensor—a high-performance sensor designed to enhance your engine's efficiency. Crafted from durable stainless steel, this sensor ensures long-lasting reliability. The sensor includes a mating connector for custom configurations, allowing seamless integration into your setup. With a precise linear voltage output of 0.5-4.5 volts, it delivers accurate readings for optimal engine management. Equip your vehicle with the trusted quality of Holley EFI and experience the difference in performance. Emission Code: 5. Part Number: 554-134. Transform your driving experience today!

Introducing the Holley EFI GPS Digital Dash USB Module—your solution to eliminating that old, noisy mechanical speedometer cable. Specifically designed for our 7" digital displays, this module offers a seamless plug-and-play installation, allowing you to effortlessly display vehicle speed on your digital dash without the need for any external sensor data. Upgrade your project vehicle with this state-of-the-art GPS module and enjoy accurate real-time speedometer readings like never before.

Introducing the Holley EFI 2 Axis G-Meter, crafted with precision to withstand even the harshest environments. Co-designed with RACEPAK, this advanced G-meter is an ideal addition to your high-powered drag radial machine or agile autocross corner carver. With dual X and Y axis outputs, it captures acceleration and deceleration on the X axis from -3 G to +12 G, and cornering forces on the Y axis up to +/-7.5 G. Streamline your installation process with pre-crimped ECU pins, and enjoy flexibility with additional loose pins for a customized fit. Perfect for racing enthusiasts aiming for impeccable performance data.