All Products

Specifically designed for use with the Holley 8.2" SBF Hi-Ram intake manifold, this compact unit shares all of the same great features of our other Holley EFI Dual Sync distributors. The design includes dual Hall Effect sensors for the crankshaft ...

Holley EFI LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses an LS1/2 MAP sensor connection to an LS3 MAP. Also gre...

Holley EFI Universal "Cut-to-Fit" spark plug wire sets for GM Ls Engines come with the spark plug terminal and boot installed with the Coil end unterminated. Coil cap boots and terminals are included so you can cut the wire to the desired length, ...

Holley EFI Universal "Cut-to-Fit" spark plug wire sets for GM Ls Engines come with the spark plug terminal and boot installed with the Coil end unterminated. Coil cap boots and terminals are included so you can cut the wire to the desired length, ...

Holley EFI Universal "Cut-to-Fit" spark plug wire sets for GM Ls Engines come with the spark plug terminal and boot installed with the Coil end unterminated. Coil cap boots and terminals are included so you can cut the wire to the desired length, ...

Holley EFI Universal "Cut-to-Fit" spark plug wire sets for GM Ls Engines come with the spark plug terminal and boot installed with the Coil end unterminated. Coil cap boots and terminals are included so you can cut the wire to the desired length, ...

This harness is designed for use with Terminator X ECU's Only with V3 build 100 or later.Specs: Brand: Holley EFI Category: Engine Crank Reluctor: 58x Emission Code: 4 Harness Application: Gen V LT4 Harness Application: LT Harness Type: Mai...

These analog-style gauges are designed specifically for use with Holley EFI systems. They are compatible with all Terminator, HP, and Dominator ECU's, allowing them to be installed in a variety of Holley EFI equipped vehicles. CAN-bus communicatio...

Holley is pleased to announce the continuation of their popular analog-style gauges with the release of a new white face 2-1/16" version, designed specifically for use with Holley EFI systems. These gauges are compatible with all Terminator, HP, a...

Replacement Bosch wideband oxygen sensor for Sniper EFI and Terminator X systems.Features: Anti-Seize pre-applied to sensor threads. Service Oxygen Sensor for Sniper EFI and Terminator X systems. Specs: Band Type: Wide Brand: Holley EFI Categor...

Holley EFI Fuel Injectors feature a precision lapped disc valve, high-quality brass windings, and high-temp O-rings. These injectors provide excellent linearity with no discernible "bounce" at low pulse widths as commonly found in other injectors....

Liquid-filled fuel pressure gauge - 0-160 PSIFeatures: 0-160 PSI Liquid Filled Fuel Pressure Gauge 2" Diameter Specs: Adapter NPT Size ( A ): 1/4 NPT MALE Bezel Color: Silver Bezel Material: Stainless Steel Body Color: Silver Brand: Holley EF...

The Holley EFI analog-style gauge is designed specifically for use with EFI systems. The 0-100 psi gauge is Glycerine (oil) filled for added durability in applications where vibration or pulsation is present. The stainless steel case and bezel cre...

This wiring kit is intended to fully populate all of the inputs and outputs for part numbers 553-111 and 553-112 Pro Dashes. These can easily be inserted into the existing 34 pin dash connector. It contains loose wires and 2 and 3 conductor cable ...

M8 Service Harness for 6.86" and 12.3" M8 Pro Dash products.Features: Replacement/service harness Designed for Pro Dash Uses M8 connectors (1) connector Specs: Brand: Holley EFI Category: Air and Fuel Delivery Category: Body Connector Color: B...

Replacement Harness for Holley EFI Pro Dashes.Features: Replacement/Service For Pro Dash product line TE Superseal 34 pin connector Refer to Owners Manual for correct inputs and outputs Specs: Brand: Holley EFI Category: Vehicles, Equipment, Too...

Holley EFI Pro Dash replacement harness for standalone digital dashes.Features: Direct replacement Plug and Play New connectors Unterminated sensor leads Specs: Brand: Holley EFI Category: Electrical, Lighting and Body Connector Color: Black E...

Designed to plug and play with MSD Pro-Billet distributors and Holley EFI main harnesses with an ignition connector, such as part number 558-104.Features:Allows for plug and play ignition timing control when utilizing an MSD Pro-Billet distributor...

Replacement/Service regulator kit for EFI regulators and Sniper EFI throttle bodies. Included are (1) O-ring and (1) regulator.Features: 175 GPH 10 micron filter 59.5 PSI preset regulator Replacement Regulator for 12-875, 12-876, 12-888, 12-889, 3...

Retrofit Regulator Kit. Replace or install a regulator in your Holley Retrofit Fuel Pump ModuleFeatures: Fits Holley fuel pump modules Retrofit kit Includes (3) pieces Follow installation instructions for proper fitment Specs: Brand: Holley EFI ...

The new single plane EFI intake manifold is designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The manifold is designed to work with 4150 Style Throttle body EFI s...

The new single plane EFI (Electronic Fuel Injection) intake manifold is designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The manifold is designed to work with 41...

Holley EFI fully standalone 2-1/16" Air/Fuel Wideband O2 Gauge Kit. This highly accurate and feature packed unit is designed specifically for use with all EFI or carbureted systems and available in both black and white face versions.Features: Comp...

The Holley EFI Stealth 4150 Fuel Log is designed to be used with either Sniper EFI Stealth 4150 or Terminator X Stealth 4150 systems. This pre-assembled fuel cross over is designed to provide ample clearance between the fuel hose, and the TPS sens...