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Choose EFI main power wiring harnesses from Holley to meet your needs. Several choices are offered—TBI, LS applications, multi-point, and un-terminated harnesses—to feed and carry your engine's electrical supply. Get wired for electronic fuel injection with Holley EFI systems main wiring harnesses.
Not Yet Reviewed
$549.95
$493.95
On Sale
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
$179.95
On Sale
GM performance fans will be geeked to learn about MSD's direct plug-in 2-Step launch controls for LS engines. These units are easy to install with factory-style connectors for a splice-free installation. When you're staged, you can hold the pedal to the floor, while the rpm stays at a consistent level, producing consistent launches.
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$349.95
$314.95
On Sale
MSD Street Fire coils will improve the performance of your late model GM or Ford vehicle. The E-core dual connector and TFI coils feature epoxy-filled construction and maximum output voltage. They mount directly in place of the factory coil and accept the factory connectors for an easy installation.
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$599.95
$41.48
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$538.95
On Sale
These MSD Ford Blaster Coil-on-Plug ignition coil packs feature a patented winding design and direct bolt-in replacement. The improved spark energy and voltage of the coil packs, combined with their reliability, have made them a favorite of performance enthusiasts. They are designed as direct bolt-in replacement coils for many SOHC Ford V8 modular engines. The housing and installation are the same as the factory coils, but that is where the similarity ends. Inside the MSD coil packs, engineers used better quality materials to assemble the primary and secondary windings. The MSD Ford Blaster Coil-on-Plug ignition coil packs take the spark energy right out of the coil and put it across the plug gap to improve the combustion and output of the engine.
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$522.95
$38.51
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$469.95
On Sale
Finally, all-out performance distributors to replace the OEM GM LT1 Optisparks--MSD's Pro-Billet LT1 distributors. They feature a precision-machined billet aluminum housing that fits in place of the factory piece, a new pickup assembly, a trick timing adjustment mechanism, and a new MSD distributor cap and rotor. The pickup is an advanced optical encoder that has proven to be very reliable and stable through extreme rpm and conditions. The rotor is bolted to a drive assembly that is indexed to the shaft, and is stabilized through the use of a large ball bearing assembly. The distributors use an adjustment screw to advance or retard the timing by up to 5 degrees.
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$799.95
$718.95
On Sale
MSD Digital GM high-energy modules with rev limiters allow you to adjust the rpm limit between 5,000 and 9,000 rpm. True high-performance modules built for HEI distributors, they produce 50 percent higher coil drive currents than the stock module. This saturates the coil faster, which gives you more spark energy at top speeds. The results are increased horsepower and rpm range, and improved starting. When used with MSD's HEI coil, these plug-in modules create a potent high-energy spark to 9,000 rpm. MSD GM HEI modules replace all 4-pin modules used in HEI distributors with a vacuum advance canister. They can be used with factory, aftermarket, or MSD HEI distributors.
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$177.95
$160.15
On Sale
APR designs their ignition coils to be direct plug-and-play upgrades to your factory coils. They provide greater energy output (by up to 10 percent) that ensures a stronger and more consistent spark and include the coveted red housing made popular by the Audi R8. Enhance both your vehicle's style and performance with APR ignition coils!
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$49.95
$31.46
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$44.95
On Sale
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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$286.95
$258.25
On Sale
New for the Holley Sniper EFI product line is a factory replacement Sniper EFI canister-style ignition coil. This ignition coil is potted with a premium-grade epoxy, making it perfect for high-vibration environments—and it can be mounted in any direction, even if it's horizontal, vertical, or upside down. "No oil" means "no failure" for multiple mounting positions. The Sniper EFI canister coil is perfect for anyone wanting to upgrade their ignition system, while maintaining a factory look under the hood. Features: * Metal canister is epoxy filled to protect the internal coil windings from high-vibration applications * Improved output coil for electronic ignitions, and MSD ignitions (ballast resistor required for points) * 100:1 turns ratio and lower primary resistance produce high-voltage output
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$63.05
$56.75
On Sale
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.
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$126.95
$114.25
On Sale
Holley EFI Smart Coils are a bolt-in ignition upgrade for your late model HEMI or Coyote engine. Here's the difference over a stock coil: they produce more spark energy while consuming less power without sacrificing voltage output. This means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder while using less power from your electrical system. Smart Coils are available individually or in sets of 8. * For Coyote or Hemi combinations currently using Holley EFI or Terminator X, use Smart Coil Ignition Harnesses 558-312 and Coil Extension Harnesses 558-326 for a plug-and-play solution. * For new Holley EFI installations on Coyote engines, use with Holley EFI Coyote TI-VCT Main Harness for Smart Coils 558-122 and Smart Coil Ignition Harness 558-312 for a plug-and-play solution. Features: * Direct bolt-on to factory valve covers * Same wiring pinout as other IGN-1A coils for easy plug-in upgrades (Will not work with factory wiring) * More spark energy than any other smart coil on the market for maximum fuel burn during combustion sequence * Low current draw means less demand on the electrical and charging system * Built-in ignitor for compatibility with Holley EFI and many other aftermarket ECUs * Maximum operating voltage of 18 V—for compatibility with both 12 V and 16 V electrical systems found in many performance/race applications
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$799.95
$718.95
On Sale
MSD Blaster Power Sports ignition coils deliver the most energy for easier starting, quicker throttle response, and powerful spark energy throughout the rpm band of your powerplant. Power Sports coils are direct bolt-on, plug-in replacements for factory units on many popular powersports machines. If you demand maximum performance for maximum fun, these easy, economical MSD upgrades are the perfect fit for your ATV, UTV, motorcycle, snowmobile, or jet ski. Benefits include: * Available in red and black * Optimized coil engineering * Easier starts * Smoother idle * Crisper throttle response * Improved power from idle to redline * Supplied with mounting bracket and hardware
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$155.95
$140.35
On Sale
Tune-up your Ford 7.3L Godzilla with MSD's direct-replacement coils. MSD is the ignition leader for performance parts that stay within your budget. These coils are available in black or red, individually or in a set of eight. Additional details: * Direct bolt-on to factory valve covers * Improved high-RPM operation * Patented winding design and materials * Direct plug-in to factory connectors
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$472.95
$56.95
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$424.95
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As LS engines make their way onto the race track MSD is ready with the Circle Track LS ignition controls. You're off to the races with MSD. Circle Track LS ignition controls feature: * Direct plug-in to factory GM LS sensors and coils * Preprogrammed to run the GM CT525 crate engine out of the box * Laptop programmable rpm limit, timing curve, and coil selection for custom tuning * Auto detects coils, cam sensor, and crank sensor * Will run 24x 1x, 58x 1x, and 58x 4x crank/cam sensor combinations * Self-powered with USB for laptop programming * Steady, accurate timing control * Dedicated plug for Tech Official
Not Yet Reviewed
$549.95
$493.95
On Sale
Tune-up your Ford 2.0L EcoBoost with MSD's direct-replacement coils. MSD is the ignition leader for performance parts that stay within your budget. These coils are available in black or red, individually or in a set of four. Additional details: * Direct bolt-on to factory valve covers * Improved high-RPM operation * Patented winding design and materials * Direct plug-in to factory connectors
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$267.95
$28.46
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$241.15
On Sale
Dinan ignition coils are designed to be direct plug-and-play replacements, or upgrades, to factory coils and provide greater energy output. With up to 10 percent more energy output than stock, the coils ensured a stronger and more consistent spark. Whether you are replacing dilapidated coils that are causing sluggish acceleration and/or misfires or simply upgrading for a more reliable and consistent spark, your ignition system will be more efficient with a new set of Dinan coils. They are available in several styles. For those that like to showcase engine modifications, Dinan coils come in a variety of unique housing colors with the Dinan logo for the perfect personalized touch.
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$37.95
$23.96
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$34.16
On Sale
MSD offers universal wiring harnesses to simplify the installation of a MSD 6 Series box on late model vehicles. The harnesses plug in between the ignition coil and the factory coil connector. Four wires with corresponding colors and matching connectors then connect directly to the MSD 6 wires. These harnesses reduce the installation time, reduce or eliminate cut wires, and allow you to quickly convert back to the factory ignition.
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$77.15
$53.35
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$69.45
On Sale
MSD Ignition's Multiple Spark Coils (MSC) will fit in place of the stock GM LS coils and connect directly to the factory connectors. Once installed, you'll have the power and performance of higher energy sparks, crowned with MSD's multiple spark discharge. Increased spark energy and voltage, along with multiple spark capabilities, help improve the combustion process of the fuel mixture to create an efficient burn. This results in improved throttle response, smooth idle and quick starts, plus increased high rpm performance!
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$149.95
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$1,078.95
$112.46
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$733.46
On Sale
The 6-Mod Ignition Controller was originally developed for the 4.6 and 5.4-liter modular motors that were fed through a carburetor rather than an electronic fuel injection system. However, with the useful options that the 6-Mod provides, such as two rev limits, a step retard and easy control over the timing, the EFI people wanted a way to take advantage of the adjustment. The harness kit provides a splice-free installation of the MSD 6-Mod Controller to factory equipped EFI vehicles making installation a snap. All of the connectors plug directly to the factory units so there is no cutting or splicing of your factory wires. Once installed, the 6-Mod allows users to advance or retard the factory's timing curve, program a step retard for use with nitrous systems or even map out a timing curve through a laptop by using MSD's Pro-Data+ software.
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$899.95
$808.95
On Sale
After an MSD DIS-2 series ignition control is installed on the waste spark ignition system of some vehicles, the ECM of the vehicle will not be able to receive a cam sync signal. These MSD cam sync generators produce a cam sync signal after startup for the factory ECM. This is done by detecting a cylinder that is under compression through its signal wire, which is wrapped around the designated spark plug wire.
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$106.95
$96.25
On Sale
Holley Hemi V8 ignition coil adapter harnesses let you take charge of your engine by controlling both fuel and spark. They are built to fit and function with the factory harness. The harnesses feature TXL-grade copper wiring with minimal weight, plus high-temperature sleeves in a small diameter. Factory-style terminations provide a strong, secure connection.
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$199.95
$179.95
On Sale
Holley products deliver the edge you need over the competition. Their Ford modular ignition coil harnesses offer true plug-and-play performance by using OE-style connectors to hook up to your factory coil packs, sensors, or control unit without any modifications. Among other functions, fully connected ECUs allow you to precisely regulate the fuel and ignition of your engine. These Holley complete harnesses enable applications with a single power adder to accommodate a greater number of controls. Order the model designed for your vehicle/engine.
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$219.95
$197.95
On Sale
DiabloSport offers high output ignition coils for a wide range of vehicles, including many Jeep, Ram, and Dodge cars and trucks from 2005 and up. They are an upgrade over stock coils for the 5.7, 6.1, 6.2, and 6.4 Hemi applications. DiabloSport found gains when installing these replacement coils on late model applications, and you can expect the same. Better throttle response, improved cold starts, and increased power output are the result of high efficiency windings that make use of better design and materials than the OEM units. The stock replacement design makes them a quick and easy installation on most applications. Order individually or in a set of 8. Product features: * High output coil upgrade * Upgraded internal materials and design * Improve power output * Works on most 2005-current Hemi applications * Factory replacement design * Simple installation * Great upgrade for older, high-mile coils * Gains of 7.8 RWHP on 2016 Hellcat at Stock Boost Level
Not Yet Reviewed
$84.29
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$599.95
$46.36
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$389.95
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