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Holley Terminator X MAX engine management systems let you take control of your domestic V8 engine. They give you complete charge of your engine and self-learning fuel strategies, along with the proven, race-winning technology of Holley EFI—all at a budget-friendly price! Every MPFI Terminator X MAX features real-time fuel learn, high-impedance injector drivers, an integrated one-bar MAP sensor—and four programmable inputs and outputs, ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Also, Holley offers the X MAX systems with either or both drive-by-wire (DBW) throttle body control or transmission control. All kits come fully loaded with base maps for common domestic V8 engine combinations to get you out of the garage and onto the road or track fast. Order the model recommended for your vehicle application. Features include: * Holley EFI industry-leading, easy-to-use software suite allows full laptop access for advanced users * Real-time fuel map learn—takes the guesswork out of tuning your base fuel table * High-impedance injector drivers will safely power most standard injectors and Holley EFI injectors (will not control low-impedance injectors) * Bosch LSU 4.9 wideband relays AFR information to the ECU for accurate reading and precise tuning control * On-board one-bar MAP sensor is perfect for N/A or nitrous engine combos * MAP sensor vacuum hose adapters * 4 inputs: 12 V, ground, 5 V, and frequency * 4 outputs: Ground, PWM, and for accessories * Boost control: boost vs. time, boost vs. gear, boost vs. rpm, boost vs. speed, and boost safeties * Nitrous control: single channel of wet or dry, progressive or non-progressive, rich/lean safeties, and target closed loop AFR; adjustable through touch screen * Advanced tables can be used for any custom tables * On-board diagnostic LEDs allow you to identify any critical engine issues at a glance * The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDs must face up! * Plug-and-play compatible with more Holley EFI accessories * Available with or without a 3.5 in. touch screen LCD hand-held with easy-to-use calibration wizard; allows you to quickly build a base tune for most V8 engines, as well as tuning and gauge display functions
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$1,789.95
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$2,299.95
Holley Terminator X MAX engine control modules are standalone units intended for use as service components for your Terminator X EFI installation. Each X MAX ECU features real-time fuel learn, high-impedance injector drivers, an integrated 1 Bar MAP sensor, electronic transmission control, drive-by-wire throttle body control, and four programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Order your Holley EFI Terminator X MAX Service ECU today. Features: * Compatible with all Terminator X harnesses * OEM (Original Equipment Manufacturer) injectors supported with part numbers provided in the handheld wizard or software * Bosch LSU 4.9 wideband control (will not work with LSU 4.2 oxygen sensors) * Eight built-in multi-color diagnostic LEDs allow you to quickly identify a variety of potential system issues, such as: -- A failed TPS (Throttle Position Sensor) Autoset -- Faulty crank or cam sensors -- Potential oxygen sensor issues * Built-in 1 Bar MAP (Manifold Air Pressure) sensor -- On boosted applications, you can disable the internal MAP sensor and utilize an external MAP sensor * Four inputs—12 V, Ground, 5 V, and Frequency for things, such as: -- Additional pressure sensors -- Activation triggers for nitrous activation -- A trans-brake (fuel and oil pressure inputs are pre-terminated) * Four outputs--Ground, PWM, and accessories, such as: -- Fans, boost control, nitrous control, IAC kit, and more * GM LS and LT, Ford Coyote, and Mopar Gen V drive-by wire throttle body control * GM 4L60 and 4L80, and Ford 4R70W transmission control * Boost Control: -- Boost vs. Time/Gear/RPM/Speed, and boost safeties * Nitrous Control: -- Single channel of wet or dry -- Progressive or non-progressive -- Rich/lean safeties -- Target closed loop AFR * Advanced tables: -- Four 1D tables -- One 1D per gear table -- Four 2D tables -- One 2D per gear table * Free EFI tuning software for complete control of your Terminator X powerplant
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$1,199.95
Holley Terminator X engine management systems let you take control of your domestic V8 engine. These kits give you complete charge of your engine and self-learning fuel strategies, along with the proven, race-winning technology of Holley EFI—all at a budget-friendly price! Every MPFI Terminator X features real-time fuel learn, high impedance injector drivers, an integrated one-bar MAP sensor—and four programmable inputs and outputs, ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. All systems come fully loaded with base maps for common engine combinations to get you out of the garage and onto the road or track fast. Features include: * Holley EFI industry-leading, easy-to-use software suite allows full laptop access for advanced users * Real-time fuel map learn—takes the guesswork out of tuning your base fuel table * High-impedance injector drivers will safely power most standard injectors and Holley EFI injectors. (Will not control low-impedance injectors) * Bosch LSU 4.9 wideband relays AFR information to the ECU for accurate reading and precise tuning control * On-board one-bar MAP sensor is perfect for N/A or nitrous engine combos * MAP sensor vacuum hose adapters * 4 inputs: 12 V, ground, 5 V, and frequency * 4 outputs: Ground, PWM for accessories * Boost control: boost vs. time, boost vs. gear, boost vs. rpm, boost vs. speed, and boost safeties * Nitrous control: single channel of wet or dry, progressive or non-progressive, rich/lean safeties, and target closed loop AFR; adjustable through touch screen * Advanced tables: 4 x 1D tables, 1 x 1D per gear table, 4 x 2D tables, 1 x 2D per gear table * On-board diagnostic LEDs allow you to identify any critical engine issues at a glance * The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDs must face up! * Plug-and-play compatible with more Holley EFI accessories * Available with or without a 3.5 in. touch screen LCD hand-held with easy-to-use calibration wizard; allows you to quickly build a base tune for most domestic V8 engines, as well as tuning and gauge display functions (not available with every kit)
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$1,349.95
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$1,899.95
Holley Terminator X engine control modules are standalone units intended for use as service components for your Terminator X EFI installation. Each ECU features real-time fuel learn, high-impedance injector drivers, an integrated 1 Bar MAP sensor, and four programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, or progressive nitrous control. Order your Holley EFI Terminator X Service ECU today. Features: * Compatible with Terminator X harnesses * OEM (Original Equipment Manufacturer) injectors supported with part numbers provided in the handheld wizard or software * Bosch LSU 4.9 wideband control (will not work with LSU 4.2 oxygen sensors) * Eight built-in multi-color diagnostic LEDs allow you to quickly identify a variety of potential system issues, such as: -- A failed TPS (Throttle Position Sensor) Autoset -- Faulty crank or cam sensors -- Potential oxygen sensor issues * Built-in 1 Bar MAP (Manifold Air Pressure) sensor -- On boosted applications, you can disable the internal MAP sensor and utilize an external MAP sensor * Four inputs—12 V, Ground, 5 V, and Frequency for things, such as: -- Additional pressure sensors -- Activation triggers for nitrous activation -- A trans-brake (Fuel and Oil Pressure Inputs are pre-terminated) * Four outputs--Ground, PWM, and accessories such as: -- Fans, boost control, nitrous control, IAC kit, and more * Boost control: -- Boost vs. Time/Gear/RPM/Speed, and boost safeties * Nitrous control: -- Single channel of wet or dry -- Progressive or non-progressive -- Rich/lean safeties -- Target closed loop AFR * Advanced tables: -- Four 1D tables -- One 1D per gear table -- Four 2D tables -- One 2D per gear table * Free EFI tuning software for complete control of your Terminator X powerplant
Not Yet Reviewed
$849.95
Holley LS coil harnesses are factory replacements for stock LS coils. These EFI LS coil sub harnesses are intended to be used with factory LS coils and various Holley EFI main harnesses with coil-on-plug connectors. They are built with the same high-quality connectors and wire loom found on all Holley EFI harnesses, guaranteeing a perfect match in your engine bay. Are you tired of scouring the junkyard for stock LS coil sub harnesses? Holley has the solution. Holley LS coil harnesses feature: * OEM connectors provide a secure connection between your ECU and Ignition Coils * Techflex F6 braided wire loom keeps your engine bay looking clean, while providing abrasion resistance * Plug-and-play fitment * Can be used to replace a damaged factory coil harness
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$199.95
Holley's EFI crank trigger kits provide accurate crank speed and position signals to Holley EFI systems in the most demanding, high-horsepower, racing applications. The crank position is measured every 10 degrees instead of every 45 degrees, like standard 4-magnet crank trigger systems. Holley's EFI crank trigger kits feature 1/4 in. thick, billet steel, 36-1 or 60-2 tooth-crank trigger wheels with black zinc oxide finish for superior corrosion resistance and striking good looks Other notable features include: * Crank wheels center off of balancer hubs, eliminating the need for centering rings * All billet, 6061-T6 aluminum sensor mounting brackets with "bright-dipped" black anodized finish and laser-etched Holley EFI logo * Custom 3-wire, ferrous-target, Hall-effect sensors with M12 x 1.0mm threads for finer gap adjustment * Grade 8 and mil-spec mounting hardware
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$649.95
Holley offers MAP sensor adapters for a variety of Chevrolet LS engine applications from 1997 and up. They feature pre-terminated connectors and wiring for a direct plug-and-play installation. Depending on the model you select, the adapter will allow: * The installation of an LS3 MAP sensor in an LS2 or LS1 equipped vehicle * The installation of an MPFI WeatherPack 3-pin connector MAP sensor to the 3-pin Delphi GT connector * The installation of a Delphi MIP 3-pin connector MAP sensor to the 3-pin Delphi GT connector
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$36.00
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$40.21
With performance engines pushing redlines up higher and higher, alternators are being forced beyond their design. Holley's premium alternators can tolerate 30 percent higher rpms than conventional models. The attention to cosmetic detail on these units is above and beyond what you would expect, too. The entire outside housing has been sculpted for a smooth silhouette that hides the ugly details we typically think of as alternators. If you drag race, autocross, or just hot rod your ride, be assured that Holley premium alternators won't fly apart on you. Features: * Available in natural, black, and polished finishes * Works with all Holley accessory brackets, as well as 4th generation F-body, most 1998 thru 2004 GM trucks, and many other applications * 150 amp output * Smaller and lighter than Holley high-amp alternators * Housings are smoothed to make polishing clean (no buffer cut marks trying to get in tight corners) * Rear cover is aluminum instead of typical black plastic * Ideal when size and clearance matter * Black and polished pulley covers are available on models that don't already include them * Designed for use with Holley alternator weatherproof pigtails (not included)
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$514.95
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$649.95
Holley Dominator EFI vehicle management systems are intended for all engine applications, from street to high-end racing. They have nearly unlimited capabilities to control any power adder, input, or output that you can throw at them. Features include: * 12 sequentially driven 8:2 peak and hold injector drivers capable of driving up to 24 low or high-impedance injectors * 12-channel distributorless ignition outputs capable of directly driving smart ignition coils or Holley DIS coils * Plug-and-play control of factory GM 24x and 58x LSX engines * Integrated electronic transmission control--currently can control GM 4L60E and 4L80E * Integrated dual channel wideband oxygen sensor controls, work with NTK or Bosch sensors * Integrated drive by wire throttle body control, can control two drive by wire throttle bodies * 4-stage progressive nitrous oxide controller * Turbo boost control * Integrated water/methanol injection control * Integrated data acquisition and control allowed with massive amount of programmable inputs and outputs * Internal data logging standard with a huge 2 GB of memory * Self-tuning fuel table strategy greatly simplifies tuning process * Store and change between four calibrations * Individual cylinder fuel and spark control allows you to unlock your engine's potential
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$3,049.95
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$3,399.95
If your vehicle's main wiring harness doesn't have COP (coil-on-plug) trigger wires, you can simply upgrade to one of Holley's universal ignition harnesses. They're specially designed to install coil-on-plug or coil-near-plug coils on Holley EFI systems into Holley Smart Coil ignition sub-harnesses or GM LSx coil harnesses. These harnesses are ideal for use with Holley HP or Dominator ECUs, but are compatible with other EFI systems, as well. Extra pins are provided for both the metripak and ECU ends, if you decide to shorten the harnesses. Caution should be taken to ensure coil trigger wires are installed in their correct pin locations to prevent engine misfire. Make certain your EFI system fires right every time with Holley universal ignition harnesses.
Not Yet Reviewed
$187.95
Holley LS extended-length main engine harnesses are 22 in. longer than previous harnesses. Designed to fit most 24x and 58x LS engines from 1997-2012, they are a perfect fit for installers wanting to mount any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access, such as on a roll bar or under the passenger seat. Notes: * Plug-and-play with Dominator, HP, Terminator X, and Terminator X Max ECUs * LS1/6 harness interfaces with 24x crank and 1x cam sensors * LS2/3/7 harness interfaces with 58x crank and 4x cam sensors
( 1 )
$672.95
Designed to extend your factory coil harness so you can easily remote-mount your ignition coils, these wire assemblies by Holley provide an ideal solution for cleaning up the look of your engine bay. They provide the means for mounting your ignition coils off the valve covers with their OEM connectors that provide a secure connection between your ECU and coils. Get the customization you want with the Holley ignition coil extension harnesses designed for your application.
( 1 )
$126.95
Holley HP EFI smart coil sub harnesses contain two preterminated harnesses designed to work with Holley HP smart coils used on 8-cylinder engines. One end plugs directly into the Holley smart coil, and the other end features a 7-pin Metri-Pak connector that plugs into the Holley universal coil-on-plug harness (HLY-558-307, not included), Holley LSx main harness, or factory GM LSx harnesses.
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$279.95
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$286.95
On Sale
You already have the wire and Holley EFI ECU connector kits have the rest of what you need to rewire your EFI installation. Fully terminate your own custom main harness with Holly EFI ECU connector kits. Features include: * Pre-terminated J1A/J1B Tyco Superseal connectors * 20 to 22 gauge pre-terminated wires * 16 to 18 gauge pre-terminated wires * Cavity plugs
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$158.95
Holley EFI remote LS coil relocation brackets are available for all existing LS coil models, as well as for Holley EFI SmartCoils. These brackets are fabricated from lightweight aluminum and allows you to discreetly remote mount your LS engine coils at a location of your choice. Each Holley EFI bracket kit was custom designed, based on the specific coil model to ensure that the coils will mount as compactly as possible--size and shape between each kit will vary depending on the coil being used. Features include: * Eliminates OE coil-on-cover clutter * Designed to custom fit all LS ignition coil models * Fabricated from lightweight aluminum * Includes coil mounting hardware * Sold as a pair (coils not included) * Available in black or natural finish
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$177.95
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$187.95
Holley performance high-amp alternators feature dual internal fans for maximum cooling and a large case design for required horsepower-to-output efficiency. When properly installed, the additional amperage from them will ensure solid voltage, even with high-consuming electrical accessories like engine fans and blower motors. They will also keep your headlights from dimming at idle.
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$319.95
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$419.95
On Sale
Holley spark plug wires will energize your project! They offer a variety of styles and configurations for countless vehicles from the 1990s and up. The wires are available assembled or cut-to-fit. Whether you're looking for high-temperature protection, race, street, motorcycle, or stock replacement, Holley has the right spark plug wires to match your needs—and supply the juice you desire. Order the set recommended for your application.
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$187.95
$103.95
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$199.95
Get the best possible sensor pickup with Holley crankshaft trigger wheels. These wheels have 60 notches, plus one TDC double notch. They are available in a number of different sizes to support the clearances on different engines from 5 in. to 8 1/2 in. in diameter. The center hole is 1 in. in diameter and may require machining for application.
Not Yet Reviewed
$299.95
Holley drive-by-wire throttle body wiring harnesses are designed for use with the Holley Dominator ECU, as well as the factory drive-by-wire throttle body. These harnesses feature pre-terminated connections, ensuring true plug-n-play installation.
Not Yet Reviewed
$474.95
Holley Performance offers late model dual pump module relay kits for a variety of applications—including many Ford, Dodge, and Chrysler vehicles from 2005 and up. Each kit includes essential parts necessary to wire twin pump modules to a vehicle. The installation starts with two high-quality Hella 40 amp relays, as well as relay sockets with 10 ft. wire lengths, 12 gauge primary wires, 16 gauge secondary signal wires, and heat shrink sealing connectors to complete your install. Also included are two fuse holders and 30 amp fuses, one for each pump.
Not Yet Reviewed
$186.95
Holley EFI Gen III Hemi VVT and SRV harnesses offer control. 2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Holley Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use of the plug-and-play VVT harness. But the fun does not stop there! If you are using a stock intake manifold that came from the factory with the Short Runner Valve (SRV), Holley also has a plug-and-play sub harness that will allow you to utilize the SRV actuator and capitalize on its low rpm torque benefits. Features: * Plug-and-play with the factory Gen III HEMI VVT sub-harness, and any Holley EFI HEMI main harness connecting to the power tap and input/output connectors * Provides control of VVT solenoid under the intake manifold * SRV (Short runner valve) connector pre-wired into the sub harness allowing you to simply plug into the factory SRV actuator in the intake manifold
Not Yet Reviewed
$163.95
Holley HP EFI ECU and harness kits allow you to manage automotive functions—like the fuel and ignition of your engine, along with controlling nitrous, boost, or water/methanol. Select the model with options needed for your vehicle application. (Note: some models are engine-specific.) Features and notes: * Eight sequentially driven 8:2 peak and hold injector drivers capable of driving up to 16 low or high-impedance injectors are standard * 8-channel distributorless ignition (DIS) outputs capable of directly driving "smart" ignition coils or Holley DIS coils * Integrated, single-channel wideband oxygen sensor control. Works with NTK or Bosch sensors. More channels can be added via CAN bus. * Internal data-logging is standard, with a huge 2GB of memory * 4-stage progressive nitrous control * Turbo boost control * Integrated water/methanol injection control * Self-tuning fuel table strategy greatly simplifies tuning process * Individual cylinder fuel and spark control allow you to unlock your engine's potential * Compatible with 4, 6, and 8-cylinder engines * Unique lbs./hr.-based fueling strategy greatly simplifies tuning * Advanced idle, closed loop, and enrichment strategies allow for very stable operation * Fully potted and can be mounted in the engine compartment or interior * Sealed automotive and marine-grade connectors * Allows for use of common OEM sensors, as well as customer sensor calibration input * Ignition plug-and-play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic, and hall effect trigger, and other ignition systems * 1-5 bar MAP sensor capability * 2-channel knock control sensor inputs for both one and 2-wire knock sensors * Dedicated fuel and oil pressure inputs * Control both stepper and PWM idle air control (IAC) motors * Speed density, Alpha-N, or combination fueling strategies * Four programmable high or low pulse width modulated (PWM) outputs and four fully configurable inputs can be configured for use * Lean or rich safety cutoff
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$2,649.95
Holley wiring harness connectors provide one-stop shopping for your wiring needs. Along with their extensive line of wiring components, Holley offers a tremendous assortment of genuine OEM connectors to hook up your wiring project properly, securely, and completely. They're available individually and in packs of 10—with most including pins, seals, and TPA. Finish wiring your Holley-powered machine with their quality wiring harness connectors.
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$11.35
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$49.95
2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Both the Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use of Holley EFI Gen III Hemi VVT harnesses. These plug-and-play harnesses (to the factory sub-harness) provide control of VVT solenoid under the intake manifold.
Not Yet Reviewed
$125.95
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