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Holley accelerator pump cams will allow you to "tailor" accelerator pump performance to your engine's actual requirements. They include cams that have a different shape or profile to give different results. Cam "lift" directly affects the accelerator pump stroke, and, therefore, pump capacity. Ramp profile or shape controls the "timing" of the shot. A steeply-rising ramp shape will give a fast, heavy fuel shot right off idle. Conversely, a gently sloping ramp will spread the pump action over a longer period of time.
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$47.55
$42.80
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Timing is everything. Holley EFI cam sync sensor kits provide the components to set your engine's power curve for optimum performance. The complete kits include a sensor, stainless steel flying magnet target with high-temperature rare earth magnet, connector, pins, seal, and washers. The kits are also available without the flying magnet target and washer; plus, the components are also available individually. Eliminate ignition timing variations and mis-adjustments with Holley cam sync sensor kits. Features include: * 3-wire Hall effect camshaft sensor generates digital square-wave signal * Can work with internal and external cam drive systems (i.e. gear, chain, and belt drive systems with or without timing cover) * Can operate from 8 to 20 V * M12x1 threads for finer gap adjustability; approximately 1.5 in. length
Not Yet Reviewed
$184.95
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$262.95
$166.45
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$236.65
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A cam sync signal is required to run sequential fuel injection, and Holley camshaft sync kits are ready to set the firing order for top performance. Available in a choice of kits for standard cam height small block and big block Chevys, as well as raised cam height big blocks, these Holley kits fit Jesel and other external, dry timing belt cam drive systems. They provide a plug-and-play cam position signal to Holley EFI systems, but are also compatible with any EFI system which can read a digital, square-wave cam input signal. All of the kits feature unique T-nut and bracket designs that allow for complete sensor adjustment from the outside of the bracket with a single jam nut. Let your ECU know which cylinder is number one in the firing order with a signal from Holley Chevy camshaft sync kits. Holley kits include: * 3-wire H all-effect sensor (8 to 20 V) * Anodized billet aluminum bracket * Mounting hardware * Mating connector * Stainless steel 1/4 in.-20 "flying magnet" screw with a high-temperature, rare-earth magnet
Not Yet Reviewed
$349.95
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$359.95
$314.95
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$323.95
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
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$1,789.95
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$2,499.95
$1,609.95
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$2,248.95
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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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$1,449.95
$1,213.95
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$1,303.95
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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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$3,399.95
$2,743.95
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$3,058.95
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Holley accelerator pump tuning kits are composed of a selection of accelerator pump hardware components, including pump diaphragms, pump nozzles, pump cams, and related parts. Contained in a convenient plastic parts case, these kits have all that is required to properly tune and calibrate the accelerator pump circuit(s) for your street, drag, Circle Track car, or tow vehicle. A handy parts guide is affixed to the inside case cover to assist in reordering components when necessary.
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$227.95
$205.15
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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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$568.95
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Holley aluminum LS valve covers will give your Chevrolet LS Series engines a totally new look. Manufactured from cast aluminum, they come in four different finishes, and feature a billet aluminum oil fill cap. Some valve covers in this series eliminate the need for the factory ignition coil bracket. Instead, the coils bolt directly to the valve covers for a nice angled look! Holley aluminum LS valve covers reuse the factory gaskets and bolts, will work with .750 in. lift camshafts using stock-style rocker arms, and fit all ignition coils with 72mm spacing.
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$693.95
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Precise timing control—Holley EFI dual-sync distributors are built with two Hall effect sensors for crankshaft and camshaft signals. The distributors can be used as just a crankshaft speed input or provide a camshaft sync signal for sequential fueling operation. They're also useful for crank and cam signals when running coil-on-plug applications. Dozens of models are available; order the one recommended for your vehicle/engine application. Some features of Holley EFI dual-sync distributors include: * CNC-machined billet aluminum housings with integrated LEDs for easy setup * Hardened steel distributor gear * Precision-machined shutter wheels that ensure accurate timing—even at very high RPM * Designed to be plug-and-play with Holley systems, but may be used with other EFI systems that support Hall effect crankshaft and camshaft sensors * Housings are available in a variety of finishes
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$499.95
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$699.95
$274.95
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$628.95
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Holley aluminum Street Avenger 4-barrel carbs give you trouble-free performance in a good-looking, easy-to-install package. The attractive aluminum finish not only gives a long lasting shine but also offers weight savings as well. They're calibrated to give you the performance you need, without the tuning headaches involved with other carbs. Features include a tunable metering system, fuel filters in the primary and secondary fuel bowls, center-hung floats, external float adjustment, choice of electric or manual choke, emissions accessory ports, adjustable secondaries, a power-valve saver, dual-feed conversion fuel line, and more. Street Avenger Carburetors also feature a four corner idle system that allows for superior idle control by utilizing primary and secondary idle adjustments, increased idle control on engines with higher performance cam shafts, and vastly improves throttle response. All of this comes with a polished finish that looks as good as it performs! They're available in many different sizes for a variety of engines.
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$719.95
$628.95
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$646.95
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Holley LS throttle bodies are unquestionably the biggest bore and most feature-loaded option available. Holley went back to the drawing board and built the ultimate air valve for your LS engine. They are available with huge 105mm or 95mm bores--and low rpm, drive-friendly tapers. The 105mm version is designed for drag race applications when wide-open throttle is all that matters. Features like idle bleed adjustment, TPS clocker, and PCV passage defeat valve units, making them the ultimate throttle bodies for ease of installation and tuning. Regardless of whether you have a turbo, supercharger, or a big cam engine sucking gulps of air, Holley LS throttle bodies are manufactured from high-grade billet aluminum, and black anodized to give them a modern tech look, they're maximized for your application.
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$743.95
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Holley Trick Kits are the inexpensive solution to fuel slosh in your carburetor. They contain all of the parts you need to perform a complete rebuild on your Holley carb, including a vent baffle, high-flow needle and seat assemblies, high-capacity power valves, pump cam and secondary opening spring assortments, gaskets, and O-rings. Plus, they have extra parts related to carburetor calibration that are required in order to accomplish a real performance tune. These include accelerator pump discharge nozzles and extra gaskets. A carburetor exploded view and detailed tuning guide are also included, with packaging that serves as a handy parts tray. Holley Trick Kits have it all.
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$208.95
$188.05
On Sale
Specifically designed for use with the Holley 8.2 in. SBF Hi-Ram intake manifold, these EFI low-profile SBF Dual Sync distributors share all the same great features of other Holley EFI Dual Sync distributors. The design includes dual Hall effect sensors for the crankshaft and camshaft signals. They can be used as just a crank speed input, as well as providing a cam sync signal for a sequential fueling operation—or to provide the needed crank and cam signals for coil-on-plug applications. The precision-machined shutter wheel design ensures accurate timing, even at very high engine speeds. Holley Sniper EFI low-profile SBF Dual Sync distributors also provide compatibility with other EFI systems that support Hall effect crank and cam sensors. Product features include: * Plug-and-play with Holley EFI * CNC-machined billet aluminum housing * Integrated LEDs allow for easy setup * Hardened steel distributor gear
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$549.95
$493.95
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Holley Sniper HyperSpark ready to run small cap distributors adds plug and play ignition timing control to any Holley EFI system. This line of distributors comes with a built-in ignition coil driver, removing the need of mounting an ignition box or external coil driver. The design includes a single Hall Effect sensor providing engine rpm to the ECU. The precision shutter wheel design ensures accurate timing, even at very high engine speeds. They can also be used with other EFI systems that support a Hall Effect crank signal input. Order the model designed for your application needs. Features: * Easiest plug-and-play way to add timing control to any Sniper EFI installation * Designed to work with HyperSpark ignition coil (PN: 556-152); also compatible with most canister ignition coils using the supplied ring terminals * Built-in ignition coil driver, safely provides enough spark energy for applications up to 450 hp * Patented clear installation cap eliminates any confusion while installing the distributor * Cast aluminum distributor housing looks right at home in nearly every engine bay * Comes with cast gear installed—contact camshaft manufacturer for recommended gear material * Comes with steel gear for SBF applications with an aftermarket camshaft * Precision shutter wheel provides the ECU a clean rpm signal via a single Hall Effect sensor, ensuring accurate timing even at high engine rpm * Shutter wheel design allows for a "timed sequential" fueling strategy with Terminator X, HP, and Dominator ECU's * Includes wire retainer for a clean installation
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$302.95
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Holley's 2-piece LS valve covers are a great way to update the look of your LS engine without the use of complicated adapter systems or the hassle of remote coil relocation. These modular LS valve covers feature an OE height, internally baffled LS valve cover base with integrated coil mounts for popular Gen I and Gen V style LS coil bodies, and a Ford style overcover that hides the unsightly LS coils and messy wiring harness. This allows the full performance benefits of coil-on-cover ignition setups without the robotic styling. These coil covers also feature cast-in provisions for the spark plug boots and coil wiring harness, so no extensions or custom wiring is required. Each 2-piece LS valve cover set includes a low-profile billet oil fill cap, hardware and spacers for mounting both versions of LS coil bodies, plus dress-up hardware and rubber grommets for the coil covers. The modular LS valve covers are available in three custom finishes: natural cast, polished, and satin black. Features: * Cast aluminum 2-piece LS valve covers designed to mount and hide both Gen I and Gen V style LS coil bodies * Retain the performance of factory coil-on-cover ignition without the unsightly styling * Coil cover features vintage Ford valve cover styling and cast-in wiring provisions * Base fits LS1, LS2, LS3, LS6 and LS7 engines with clearance for .750 in. lift cam with stock-style rocker arms * Base features internally baffled ventilation system * No coil relocation, wire harness extensions, or custom spark plug wires required * Includes low-profile billet oil fill cap * Includes all necessary coil mounting provisions and dress-up hardware
Not Yet Reviewed
$499.95
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$573.95
$448.95
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$515.95
On Sale
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
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$672.95
$604.95
On Sale
Holley electric in-tank fuel pumps provide the extra fuel required after completing other engine modifications, such as adding performance camshafts, headers, larger injectors, and so on. They use a proven gerotor-type pump and are compact enough to fit existing hanger assemblies. They're also designed for easy installation and come complete with instructions and all necessary parts, including a new strainer-type fuel filter. Dozens of models and options are available; order the fuel pump recommended for your vehicle.
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$178.95
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$583.95
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Holley modular LS Pontiac-style valve covers feature an OE height, internally-baffled base with integrated coil mounts for popular Gen I and Gen V-style LS coil bodies. The overcovers hide the unsightly LS coils and messy wiring harness—allowing the full performance benefits of coil-on-cover ignition setups without the robotic styling. Each modular coil cover features a simulated oil fill cap which helps maintain the original Pontiac styling. The coil cover also features cast-in provisions for the spark plug boots and coil wiring harness, so no extensions or custom wiring is required. Holley's 2-piece LS Pontiac-style valve covers offer a great way to update the look of your LS engine without the use of complicated adapter systems or the hassle of remote coil relocation! More product features and items include: * Available in various finishes * Base fits LS1, LS2, LS3, LS6, and LS7 engines with clearance for 0.750 in. lift cam with stock style rocker arms * Base features internally baffled ventilation system * Each 2-piece LS valve cover set includes a low-profile billet oil fill cap, 2 billet simulated fill cap assemblies, hardware, and spacers for mounting both versions of LS coil bodies * Dress-up hardware and rubber grommets for the coil covers
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$586.95
$527.95
On Sale
Holley EFI Dominator throttle bodies are the ultimate air valves for your hotrod's powerplant. These billet aluminum 2,550 cfm throttle bodies are loaded with features that will make them at home on even the largest displacement engines. They showcase roller bearing throttle shafts for ultra-smooth throttle action, non-contact magnetic throttle position sensors (TPS) sensors, and index-able throttle levers. Their lightweight construction also features dual throttle blades for maximum airflow and they are available with and without supplemental injector provisions (four injectors per throttle body and rails). Want to maximize your engine's power? Whether you have a turbo, supercharger, or a big cam engine pumping massive gulps of air, Holley EFI Dominator-flange throttle bodies will make the most of your fuel injection.
Not Yet Reviewed
$2,199.95
$1,429.95
On Sale
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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$403.95
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$448.95
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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
$143.05
On Sale
Holley M/T valve covers are flashbacks to 1972. Nothing was cooler than cruising in your hot rod with a Holley double pumper and M/T finned aluminum valve covers. Each Holley M/T valve cover is precision-manufactured with knockout plugs for stock PCV and oil fill installations. These covers feature polished top cover surfaces that may be used for engraving your name horizontally next to the deep heat dissipating fins. Available in your choice of black crinkle or a polished finish, each Holley M/T valve cover comes in retro packaging styled after the original. Order the pair designed for your engine application.
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$268.95
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$599.95
$242.05
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$538.95
On Sale
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
$583.95
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