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Holley Mid-Mount complete accessory systems achieve what no other accessory bracket systems do--eliminate the brackets! This pulls in all the accessories tighter than other accessory drives by bolting directly to other components for a clean, integrated form. They offer superb engine visibility to show off your horsepower, not your accessories. Holley Mid-Mount complete accessory systems are available in several versions and finishes to match your application. Order the kit designed to fit your engine.
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$4,599.95
$2,068.95
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$4,449.95
On Sale
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
( 90 )
$2,499.95
$2,023.95
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$3,299.95
On Sale
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
$2,743.95
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$3,058.95
Ready for standalone engine management at a budget price? Take control of your GM Gen V LT1, L83, or L86 engine with a Holley Terminator X Max GM Gen V LT direct injection kit! They're available to fit early non-WT drive-by-wire engines, as well as late WT drive-by-wire engines. Terminator X and X Max features and benefits: * Plug-and-play GM Gen V LT engine control, including GDI and VVT support * Ideal for swapping late model GM Gen V LT engines into vintage vehicles * 3.5 in. hand-held gets your engine running in no time with a step-by-step calibration wizard * GM LS and LT drive-by wire throttle body control (Terminator X Max only) * GM 4L60 and 4L80 transmission control (Terminator X Max only) * Included engine harness plugs directly into the factory LT DI injector sub harness * OEM Injectors supported, with part numbers provided in the handheld wizard or software * Genuine Bosch LSU 4.9 wideband control (will not work with LSU 4.2 oxygen sensors) * On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal – VVT Status – Pump Control – and DI Injectors. This allows you to identify any critical engine issues at a glance * Built-in 1 bar MAP sensor, vacuum hose adapters included (1/8th, 1/4 and 3/16ths); or for Boosted applications, you can disable the internal MAP sensor, and utilize an external LT MAP sensor. The harness comes with the connector terminated, making the installation a snap * 4 inputs: 12 V, Ground, 5 V, and Frequency—for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure inputs are pre-terminated) * 4 Outputs: -- Ground -- PWM – for accessories such as fans, boost control, nitrous control, IAC kit, and more -- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties -- Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR * Integrated data logging to the 3.5 in. hand-held SD card * Free EFI tuning software for complete control of your Terminator X powerplant Terminator X Max ECU Connections: * J1A - Main Harness Connector: This connector is primarily an "Input" connector. It contains all the sensor inputs and wide band oxygen sensor control. * J1B - Main Harness Connector: The second connector is the "J1B" connector (26 pin). This connector is the "output" connector. It has eight injector outputs and outputs for other devices. * MAP Sensor: Used on N/A applications, connect directly to full manifold vacuum port on the intake manifold. * Main Power: Connects to the Main Power Harness; these two wires MUST be wired directly to the battery terminals. * J3: Connection point for the drive-by-wire harness. * J4: Connection point for the transmission harness.
Not Yet Reviewed
$3,049.95
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$3,549.95
On Sale
Holley Terminator Max X Stealth 4150 58X LS EFI systems feature four 100 lbs./hr. fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications. The Terminator X ECU provides fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! Holley Terminator Max X Stealth 4150 58X LS EFI fuel injection systems also include transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications, as well as plug-and-play transmission control for GM 4L60 and 4L80 applications. System features include: * All wiring exits below the fuel injector bowls for a complete stealth installation * Air entry machined to fit most stock-style air cleaners with air cleaner locator provisions * Integrated ignition timing control offers plug-and-play with factory LS coil sub-harness and OEM LS coils (no external boxes/modules needed to run coil near plug) * High-resolution, full-color touchscreen for initial setup, tuning, and gauge displays * Simple calibration wizard—no laptop required * Four inputs (12 V, ground, 5 V, and frequency) for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (fuel and oil pressure inputs are pre-terminated) * Four outputs (ground, PWM -) for accessories such as fans, boost control, nitrous control, IAC kit, and more * Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning * OEM-style TPS/IAC for years of dependable service * Available in three finishes: shiny, black, and gold * Compatible with Holley EFI digital dashes, gauges, and fuel system accessories
( 1 )
$2,749.95
$2,473.95
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$2,749.95
On Sale
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
$2,383.95
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$3,499.95
On Sale
Holley Terminator Max X Stealth 4150 24X LS EFI systems feature four 100 lbs./hr. fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications. The Terminator X ECU provides fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! Holley Terminator Max X Stealth 4150 24X LS EFI fuel injection systems also include transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications, as well as plug-and-play transmission control for GM 4L60 and 4L80 applications. System features include: * All wiring exits below the fuel injector bowls for a complete stealth installation * Air entry machined to fit most stock-style air cleaners with air cleaner locator provisions * Integrated ignition timing control offers plug-and-play with factory LS coil sub-harness and OEM LS coils (no external boxes/modules needed to run coil near plug) * High-resolution, full-color touchscreen for initial setup, tuning, and gauge displays * Simple calibration wizard—no laptop required * (4) inputs (12 V, ground, 5 V, and frequency) for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (fuel and oil pressure inputs are pre-terminated) * (4) Outputs (ground, PWM -) for accessories such as fans, boost control, nitrous control, IAC kit, and more * Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning * OEM-style TPS/IAC for years of dependable service * Available in 3 finishes: shiny, black, and gold * Compatible with Holley EFI digital dashes, gauges, and fuel system accessories
Not Yet Reviewed
$2,749.95
$2,473.95
On Sale
Holley Terminator X Stealth 4150 24X LS EFI systems feature four 100 lbs./hr. fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications. The Terminator X ECU provides fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! Holley Terminator X Stealth 4150 24X LS EFI fuel injection systems also include transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications. System features include: * All wiring exits below the fuel injector bowls for a complete stealth installation * Air entry machined to fit most stock-style air cleaners with air cleaner locator provisions * Integrated ignition timing control offers plug-and-play with factory LS coil sub-harness and OEM LS coils (no external boxes/modules needed to run coil near plug) * High-resolution, full-color touchscreen for initial setup, tuning, and gauge displays * Simple calibration wizard—no laptop required * Four inputs (12 V, ground, 5 V, and frequency) for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (fuel and oil pressure inputs are pre-terminated) * Four outputs (ground, PWM -) for accessories such as fans, boost control, nitrous control, IAC kit, and more * Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning * OEM-style TPS/IAC for years of dependable service * Available in three finishes: shiny, black, and gold * Compatible with Holley EFI digital dashes, gauges, and fuel system accessories
Not Yet Reviewed
$2,249.95
$2,023.95
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$2,249.95
On Sale
Holley Terminator X Stealth 4150 58X LS EFI systems feature four 100 lbs./hr. fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications. The Terminator X ECU provides fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! Holley Terminator X Stealth 4150 58X LS EFI fuel injection systems also include transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications. System features include: * All wiring exits below the fuel injector bowls for a complete stealth installation * Air entry machined to fit most stock-style air cleaners with air cleaner locator provisions * Integrated ignition timing control offers plug-and-play with factory LS coil sub-harness and OEM LS coils (no external boxes/modules needed to run coil near plug) * High-resolution, full-color touchscreen for initial setup, tuning, and gauge displays * Simple calibration wizard—no laptop required * Four inputs (12 V, ground, 5 V, and frequency) for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (fuel and oil pressure inputs are pre-terminated) * Four outputs (ground, PWM -) for accessories such as fans, boost control, nitrous control, IAC kit, and more * Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning * OEM-style TPS/IAC for years of dependable service * Available in three finishes: shiny, black, and gold * Compatible with Holley EFI digital dashes, gauges, and fuel system accessories
Not Yet Reviewed
$2,249.95
$2,023.95
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$2,249.95
On Sale
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)
( 96 )
$2,549.95
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$2,949.95
On Sale
Now available from Holley are LS engine swap accessory drive systems. Included are accessories and pulleys that are manufactured by OEM part suppliers for durability and direct bolt-on installation. Order the kit that's best suited for your vehicle and engine application. Features and facts: * Universal brackets fit virtually all common LS engines, regardless of water pump and harmonic balancer offsets--thus reducing cost and complexity compared with competitive products * Simple, dedicated installation kits allow easy fitment to Corvette, F-Body, or truck drive offsets * Accessories, tensioner, and pulleys are manufactured by OEM suppliers and many of the parts are used on production vehicles today
( 34 )
$2,249.95
$2,023.95
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$2,699.95
On Sale
Holley High-Mount complete accessory systems offer exceptional clearance for swap applications when your chassis clearance is very limiting. They mount your accessories higher on the engine with many configurations and accessory options available. Holley High-Mount complete accessory systems are available in a natural, black, or polished finish. Order the kit designed to fit your LS/LT engine.
Not Yet Reviewed
$2,499.95
$2,248.95
Gear up for your next off-road adventure with complete Performance Package upgrades from Holley Off-Road. They deliver performance systems from exhaust to brakes, tuners, suspension, and more, and their products are engineered to work together, ensuring you have everything you need to have fun on and off the road. Holley Off-Road 2016-23 Toyota Tacoma performance packages give your vehicle a major performance boost in key areas like suspension and exhaust. The ADS Mesa front and rear shocks improve ride quality and control, making sure you're set up for a smoother, more stable drive whether you're cruising or off-roading, while the ADS tubular front upper control arms help with suspension strength and geometry, ensuring better handling and alignment for more precise driving. Making your vehicle really stand out is the Flowmaster Outlaw Extreme cat-back exhaust system that boosts your engine's output while giving you that unmistakable Flowmaster aggressive sound. Together, these parts work in sync to improve how your vehicle handles, performs, and sounds, creating a more exciting and capable driving experience. Enhance power, control, and style with the expertly crafted components in a Holley Off-Road performance package. Features: * ADS Mesa 2.5 front shocks: The large bore 2.50 in. shock body increases fluid capacity, effectively resisting shock fade to boost off-road performance. Fully rebuildable. * ADS Mesa 2.5 rear shocks: Internal floating piston (IFP) ensures consistent damping performance, improved responsiveness, and increased longevity and reliability. * ADS tubular front upper control arms: Accommodate lifts to 4 in., correct camber and caster for a smoother ride, and are fully rebuildable, making them a sustainable and long-lasting upgrade. * Flowmaster Outlaw Extreme cat-back exhaust systems: Features Outlaw Series muffler for a deep powerful sound and increased performance.
Not Yet Reviewed
$3,350.95
Gear up for your next off-road adventure with complete Performance Package upgrades from Holley Off-Road. They deliver performance systems from exhaust to brakes, tuners, suspension, and more, and their products are engineered to work together, ensuring you have everything you need to have fun on and off the road. Holley Off-Road 2014-18 Chevy/GMC performance packages are comprehensive upgrades specifically tailored to these pickups. The suspension upgrades feature ADS Racing Mesa 2.5 Series shocks, which are larger than stock, providing increased fluid capacity to prevent shock fade and deliver exceptional off-road durability combined with commuter comfort. The kits also include a Flowmaster Signature Series exhaust system, known for its hand-welded 304 stainless steel construction and balanced sound profile, offering an aggressive yet moderate tone. Additionally, these packages are equipped with a DiabloSport PredatorX, which provides pre-loaded tunes and customization options for optimal performance. Finally, the Big Claw performance rotors, designed for improved braking performance and enhanced cooling, ensure safety and reliability during high-performance driving. Features: * ADS Mesa 2.5 in. front coilovers: Premium shock absorbers are designed for maximum durability and performance, featuring a UV-stable ceramic powdercoated steel shock body and black anodized billet aluminum top and bottom caps. * ADS Mesa rear shocks: Filled with premium full synthetic shock oil, the shock absorber incorporates an internal floating piston (IFP) to ensure consistent damping performance, improved responsiveness, and increased longevity. * Flowmaster Signature Series exhaust: Premium exhaust system is TIG welded for a stronger, more precise weld that looks as good as it sounds. * Diablosport PredatorX: PredatorX is the latest in tuning technology. Using your smartphone, you can interface with PredatorX through our mobile app and handle all of your tuning needs, right from your pocket. * Baer Brakes: Baer Brakes Claw combo kits are a great way to improve your vehicles braking performance and overall appearance at an affordable price.
Not Yet Reviewed
$4,118.95
On Sale
Take control of your engine a Holley Terminator LS plug-and-play multi-port engine management system. They include all the necessary parts to control the fuel, spark, 4L60/4L80E or 4L60E/4L80E transmission, the vehicle's drive-by-wire, or some combination of those (depending on the application) on your stock or mild LS. Order the model recommended for your year/make and engine application. Holley Terminator LS plug-and-play multi-port systems include: * Terminator EFI ECU * Terminator hand-held controller with 3.5 in. full-color touch screen * Main power harness * Main engine harness * Injector harness * Other harnesses as required by the application * Oxygen sensor with fitting
( 1 )
$4,349.95
$3,913.95
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