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On Sale
Holley EFI CAN Input/Output Modules Kits
The Holley EFI CAN Input/Output Module kit can be added to Holley EFI HP, Dominator, Terminator X and Terminator X Max EFI installation. This CAN module will add eight inputs and eight outputs to the system, which can be used to control additional accessories or provide critical sensor inputs. This module is perfect for anyone wanting to enhance the capabilities of their current ECU, yet have already tapped out their ECU's Input/Output channels. Product features: * Quickly expand your HP/Terminator X or even Dominator ECU's Input/Output control with 8 additional inputs and outputs * This module is perfect for anyone wanting their Holley EFI ECU to control more functions or monitor more data channels * HP and Terminator X EFI installations with only 4 inputs and 4 outputs can now add more functionality to their EFI system * The 554-165 kits contain a pre-terminated CAN harness, allowing you to quickly install the Holley EFI CAN Module to any existing Holley EFI installation * Pre-terminated flying leads makes installing new wires a breeze * Inputs can be used for things such as: - Switch 12 V toggle switches; can be configured for external mechanical relays, or setup as digital switches via a Holley EFI dash - Ground input for brake pedal switch - 5 V analog inputs for sensors like fuel pressure, oil pressure, or nitrous bottle pressure - Thermistor inputs for coolant temperature sensors * Outputs can be used for things such as: - Switch Low (ground); for relay control or activation - Switch Low PWM (ground); PWM fan control, PWM fuel pump control, or other PWM-controlled devices * Adjustable broadcast rate for each channel: from 0-100hz
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$499.95
$409.95
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$448.95
On Sale
Holley EFI Fuel System Plumbing Kits
Holley EFI fuel system plumbing kits are the perfect complement to your Sniper EFI or Holley EFI kit. These plumbing assemblies are engineered using Holley fuel pumps, regulators, and filters—coupled with Earl's Performance plumbing, to provide a fuel system tailored to your vehicle's specific needs. Components vary, depending on the kit you select.
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$377.95
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$549.95
$340.15
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$493.95
On Sale
Holley Sniper 3.5 in. LCD Touch Screen Controller
The Holley Sniper 3.5 in. LCD touch screen controller gives you access to a wide range of tuning options. These hand-held controllers can be used as a fully customizable data monitor—and with the unit's 3.5 in. display, your Sniper EFI system vitals can be viewed at a quick glance! Features and benefits include: * Full color, backlit 3.5 in. touch screen LCD * Laptop-free tuning changes to help optimize mileage, drivability, and performance * Basic tuning options allow simple adjustments of basic fuel, fuel learn, basic idle, spark, and more * System tuning options allow modifications to outputs, engine setup, ignition setup * Advanced tuning options allow fine-tuning of fuel, closed loop, learn, and idle—including IAC parameters and idle spark * Monitor a vast number of parameters in pre-configured, multi-gauge, and monitor screens—or customize your own * Set up ECU data-logging, download data-logs to SD card, upload and download global folders via SD card, update ECU firmware, and adjust rev limiters 1 and 2 * Includes 3.5 in. touch screen, mounting sleeve, power and extension harness, and SD card
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$399.95
$359.95
On Sale
Holley Terminator X 3.5 in. Handheld Controllers
With Holley Terminator X 3.5 in. handheld controllers, your system vitals can be viewed with a quick glance. The full color, backlit LCD touch screen provides access to a wide range of tuning options and can also be used as a fully customizable data monitor. Holley Terminator X 3.5 in. handheld controllers include mounting sleeve, power and extension harness, SD card, and user manual CD. Features: * Laptop-free tuning changes to help optimize mileage, drivability, and performance * Basic tuning options allow simple adjustments of Basic Fuel, Fuel Learn, Basic Idle, Spark, and more * System tuning options allow modifications to Outputs, Engine Setup, Ignition Setup * Advanced tuning options allow fine tuning of Fuel, Closed Loop, Learn, and Idle (including IAC parameters and Idle Spark) * Monitor a vast number of parameters in pre-configured Multi-Gauge and Monitor Screens, or customize your own * Set up ECU datalogging, download datalogs to SD card, upload and download global folders via SD card, update ECU firmware, and adjust rev limiters 1 and 2
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$357.95
$322.15
On Sale
Holley Sniper 2 EFI 3.5 in. LCD Touch Screen Controllers
Holley Sniper 2 EFI 3.5 in. LCD touch screen controllers give you access to a wide range of tuning options. These hand-held controls can be used as a fully customizable data monitor—and with the unit's 3 1/2 in. display, your Sniper EFI system vitals can be viewed at a quick glance! Monitor a vast number of parameters in pre-configured, multi-gauge, and monitor screens—or customize your own with Holley Sniper 2 EFI 3.5 in. LCD touch screen controllers. Features and benefits include: * Full-color, backlit 3 1/2 in. touch-screen LCD * Laptop-free tuning changes to help optimize mileage, drivability, and performance * Basic tuning options allow simple adjustments of basic fuel, fuel learn, basic idle, spark, and more * System tuning options allow modifications to outputs, engine setup, and ignition setup * Advanced tuning options allow fine-tuning of fuel, closed loop, learn, and idle—including IAC parameters and idle spark * Set up ECU data-logging, download data-logs, or upload and download global folders with the SD card, update ECU firmware, and adjust rev limiters 1 and 2 * Includes the touch screen controller, mounting sleeve, power and extension harness, and SD card * Screen dimensions – 3.350 in. wide x 2.850 in. tall x 0.700 in. thick * Sleeve dimensions – 3.625 in. wide x 2.925 in. tall x 1.000 in. thick
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$286.95
$258.25
On Sale
Holley EFI Systems Wiring Harnesses
Holley offers a variety of direct replacement EFI wiring harnesses, including multi-port, sequential, and throttle body injection styles. These units are made with premium components to ensure better reliability and performance for your ride--and they're compatible with many engine swaps. Holley EFI systems wiring harnesses are sold individually or as a kit; choose the model needed for your fuel injection application.
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$549.95
$255.95
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$493.95
On Sale
Holley Sniper HyperSpark Plug-and-Play Main Wiring Harnesses
Holley Sniper HyperSpark plug-and-play main wiring harnesses were designed to make upgrading your ignition on a Sniper EFI-equipped engine easy. When this harness is installed concurrently with a new Sniper EFI system, the combination creates the easiest to install EFI conversion on the market—only four flying lead connections required! Key features: * Harness only requires one connection to a switched power source, battery positive, battery negative, and fuel pump power * Pre-terminated connectors and a built in 40A relay provides power to all of the components within the system * With the included Sniper EFI main harness, you no longer need to run multiple wires to provide switched power for each individual component, which not only helps prevent wiring confusion, but it will also speed up your install time and clean up your engine bay * Just route the harness and pre-terminated connectors to your HyperSpark coil, distributor, and ignition box and plug them in
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$327.95
$295.15
On Sale
Holley 3.5 in. LCD Touch Screen Upgrades
Holley 3.5 in. LCD touch screen upgrades provide laptop-free tuning changes to help optimize mileage, drivability, and performance. Basic tuning options allow simple adjustments of basic fuel, fuel learn, basic idle, spark, drive-by-wire, and transmission; while System Tuning options allow modifications to outputs, engine setup, ignition setup, and additional transmission setup; and Advanced Tuning options allow fine-tuning of fuel, closed loop, learn, and idle (including IAC parameters and idle spark). The upgrades can monitor a vast number of parameters in pre-configured, multi-gauge, and monitor screens--or allow you to configure your own. You can set up ECU data-logging, download data logs to an SD Card, upload and download global folders via SD Card, update ECU firmware, and adjust rev limiters. Holley 3.5 in. LCD touch screen upgrades include a mounting sleeve, power and extension harness, SD card, and user manual CD.
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$409.95
$367.95
Holley Water/Methanol Injection System Installation Kits
Holley water/methanol injection system installation kits are designed for use with Holley HP and Dominator EFI systems. They are programmed for 100 percent water and up to a 50/50 percent mixture of water and methanol--never use more than 50 percent methanol in the mixture, or damage to components may result. These are installation kits only; a pump and solenoid(s) are required, as well. Kits include: * Reservoir * Low-level float * Filter * Tubing * Relay * Relay wiring fuse * Warning LED * Fittings
Not Yet Reviewed
$294.95
On Sale
Holley EFI Pro Dash Input/Output Harnesses
Holley Pro Dash input/output wiring harnesses are intended to fully populate all of the inputs and outputs for Holley Pro Dashes. The wire is 20-gauge TXL with TE Superseal pins crimped on every wire and cable, and can easily be inserted into the existing 34-pin dash connectors. Holley Pro Dash wiring harnesses contain loose wires, 2 and 3 jacketed conductor cables, and extra pins that can be used (likely needed when using the jacketed cable for more than one sensor). You can choose to match the color and functions given in the instructions for consistent installations. Content specifics: * 17 loose wires, each 10 ft. in length, various colors with crimped tyco pins * 2-conductor cable, black/blue, 20 ft. * 3-conductor cable, orange/green/black, 40 ft. * Superseal pins and plugs, 20 of each
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$282.95
$254.65
Holley EFI Terminator X Drive-By-Wire Throttle Body Wiring Harnesses
For an uncluttered, hassle-free LT engine swap, Holley EFI Terminator X drive-by-wire throttle body wiring harnesses are the solution. Designed for Gen V LTx throttle bodies and Terminator X and X Max ECUs, the harnesses are built with pre-terminated ends to make your install easier. Build your project to take advantage of DBW benefits with the help of Holley EFI's drive-by-wire throttle body wiring harnesses.
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$286.95
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$290.95
On Sale
Holley Replacement Fuel Injector Wiring Harnesses
These Holley replacement fuel injector wiring harnesses are replacements for the 8-cylinder injector harnesses. They connect the main harness to the injectors, routing the wires over the rail and making replacement a snap!
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$280.95
$252.85
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$319.95
Holley Drive-By-Wire Dual Throttle Body Harnesses
Holley Drive-By-Wire (DBW) dual throttle body harnesses are for use with the Dominator EFI ECU, which has built-in capability to control OEM-type DBW throttle pedals and throttle bodies for aftermarket installation. These plug-and-play harnesses are available for the most popular engine swaps. Order the throttle body harness designed to fit your application. Wiring harness features: * Harnesses are available to connect to a late model HEMI engine for the most advanced fuel and timing controls available * Each harness is designed in fit and function specifically for Gen III HEMI engine platforms * All wiring is TXL-grade copper wiring with minimal weight; high-temp sleeve in a smaller diameter * Factory-style terminations provide a strong, secure connection * Connectors are OEM-grade for a correct, positive fit * Each harness is routed through a split-loom braid for protection and great looks
Not Yet Reviewed
$377.95
On Sale
Holley EFI Terminator Stealth Main Wiring Harnesses
Holley EFI Terminator stealth main wiring harnesses are the direct connection for Terminator Stealth EFI systems. They are also perfect for anyone wanting to convert their 2 x 4 supercharged combo over to EFI. These harnesses are plug-and-play, provide a clean finished appearance, and allow for a quick install.
Not Yet Reviewed
$511.95
$459.95
Holley EFI Water and Methanol Injection Solenoids
Holley EFI water and methanol injection solenoids, when used with their other water/meth injection components take your forced induction ride to the next level. Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol injection, allowing you to safely run on lower octane pump gas! These solenoids are run by an injector driver output and are compatible with a water/methanol mix of up to 50 percent methanol.
Not Yet Reviewed
$460.95
On Sale
Holley Drive-By-Wire Throttle Body Wiring Harnesses
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
$485.95
$255.95
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$436.95
Holley Ford Coyote TI-VCT Sub Harnesses
Holley EFI Ford Coyote Ti-VCT sub harnesses interface a Holley EFI ECU to a Ford Coyote engine that will utilize a Holley Twin Independent Variable Cam Timing (Ti-VCT) controller. Together along with the Coyote main harness (not included), you'll be able to unlock the full potential of your high-revving power plant. These plug-and-play sub harnesses are designed specifically for Coyote engines.
Not Yet Reviewed
$278.95
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$409.95
On Sale
Holley Replacement Pressure Transducers
Help your fuel injection system keep up on measured pressures with these Holley replacement pressure transducers. They include a wiring pigtail, are available for all Holley EFI fuel injection systems, and come in different pressure ranges to suit your engine application requirements.
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$306.95
On Sale
Holley Terminator X Max Chrysler Transmission Wiring Harnesses
Control select Hemi swap project transmissions through Terminator X MAX ECUs with Holley Chrysler transmission wiring harnesses. Terminator X ECUs give you unprecedented control of various components and systems within the drivetrain for enhanced driving performance. And Holley Chrysler transmission wiring harnesses provide plug-and-play compatibility with most factory connectors on select Chrysler transmissions for easier project completion.
Not Yet Reviewed
$281.95
$253.75
On Sale
Holley Cooling Manifolds
Holley cooling manifolds are designed for use with their mid-mount accessary drive systems. These aluminum manifolds are offered with a black, polished, raw, or satin finish. Keeping your vehicle cool is the key to maximum performance. Holley cooling manifolds will help dissipate some of that extra heat.
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$434.95
$390.95
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$460.95
On Sale
Holley GPS Speedometers
Holley's incredible line of digital precision gauges with an analog-look includes Holley GPS speedometers. They're offered in 3 3/8 in. and 4 1/2 in. diameter versions, with black or white face. You won't find a better GPS-based speedometer on the market. No connection to the transmission is required, so they're a breeze to install. In addition to mph, they show quarter-mile time; 0-60 mph time; mileage/trip odometer; direction; and time of day. Additional GPS speedometer details: * GPS antenna with a 15 ft. long cable allows you to place the antenna in the most convenient location—nearly anywhere in or on the vehicle * Hot-start feature means that the GPS is usually displaying speed data within 2-3 seconds of power-up * Compatible with Holley EFI touch screens, dashes, hand-held tuners, and other CAN devices * 240-degree sweep pointer from 8 to 4 o'clock makes them easy to read at a glance * Internal microprocessor ensures accurate pointer movement in street and racing conditions * Spin-lock ring threads to the back of the gauge case for simple and secure mounting * CNC-machined billet aluminum bezels with anodized finish—threaded for easy replacement
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Holley EFI Single-Channel EGT Kits
Introducing the Holley EFI Single-Channel EGT kits! They keep you in-the-know about what's going on with your engine. Exhaust gas temperature data is critical information when your engine tune-up seems to be on the ragged edge. Knowing the exhaust temp can help you identify potential horsepower left on the table, or pinpoint any weak links in your max effort race engine. Holley offers these EFI Single-Channel EGT kits for non-Holley applications, as well as compatibility with HP Tuners, Dominator EFI, and Terminator X. Order the Holley EFI Single-Channel EGT kit to meet your application needs. Kit features, specs, and parts may include: * Single-Channel CANbus EGT controller module for quick and easy installation with Holley EFI—or Single-Channel Analog EGT controller with unterminated output wires for universal installations (please specify when placing order) * High-quality 1/4 in. stainless steel EGT weld bung * Robust 1/4 in. probe designed to withstand extreme cylinder pressures * Sensor (included) is designed to work with any engine combination, with an open reinforced tip for the fastest response rate and improved shielding
Not Yet Reviewed
$319.95
On Sale
Holley Sniper EFI HyperSpark 2 CD Ignition Boxes
Direct upgrade for existing HyperSpark ignition box, Holley Sniper EFI HyperSpark 2 CD ignition boxes feature a smaller form factor and hotter spark. These low-profile boxes can fit nearly anywhere inside of your engine bay or cockpit. They have all the proven features of their predecessor in a smaller package, making it easier to mount, providing the cleanest installation possible. HyperSpark 2 ignition boxes pack up to 150 mJ of spark energy when used with the matching ignition coil, resulting in enough energy to safely fire your Sniper EFI engine combination. Features: * Plug-and-play with existing HyperSpark installations, or Sniper EFI HyperSpark main harnesses * Includes an ignition harness for fresh Sniper EFI Installs simply wanting to add timing control * New processor and board design provide a highly efficient ignition, minimal heat, and maximum spark energy with less current draw * High rpm operation and maximum output using the HyperSpark ignition coil * Powerful capacitive discharge of multiple sparks improves performance and ensures complete combustion * Consistently high-spark energy of 135 to 150 mJ for every firing, from idle to redline rpm * Operates on most 7 to 28 V electrical systems * Fully protected against an open coil, shorted coil, and open load * 1.47 lbs. lighter than an original HyperSpark ignition box * Quickens throttle response and improves starting * Tach Output to drive an external tachometer
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$409.95
$367.95
On Sale
Holley Sniper EFI HyperSpark Distributors
Do you need to upgrade your ignition system due to a recent Sniper EFI installation, but have no idea which option is best? Introducing Holley Sniper EFI HyperSpark distributors. These billet distributors use a hall-effect crank signal sensor, providing a noise-free RPM signal to the Sniper ECU. HyperSpark distributors include a patented clear installation cap that eliminates any confusion when installing the distributor. They're an easy plug-and play solution to add timing control and complete your Sniper EFI installation. Many options are available; choose the model recommended for your year/make and engine application.
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