Holley Performance Parts – EFI, Intakes, & More

Direct upgrade for existing HyperSpark ignition box, featuring a smaller form factor and hotter spark. This low profile box can fit nearly anywhere inside of your engine bay or cockpit. The...

The Holley EFI CAN splitter allows you to add an additional CAN device to your Sniper EFI or Terminator X installation, without needing to unplug the handheld. This easy to install CAN splitter...

Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? This harness is designed to do exactly that! The Sniper adapter harness is a plug-and-play...

This Throttle Position Sensor fits all Terminator 4150 Throttle Bodies, and Sniper EFI 4150 Throttle Bodies. Additionally, it is the service replacement sensor for the following:...

This ignition adapter ensures your Sniper EFI ignition installation is a snap! Simply plug up both connectors, terminate the Pink Wire to a Switched 12v Ignition Source, and you're finished...

The Holley EFI Can Adapter/Power Harness adapts two pin Holley main harness CAN connectors to new style 4 pin CAN devices.

The Holley EFI 5-inch Digital Dash comes out of the box, ready to plug and play with your Gen 1 Sniper EFI, Terminator X or X MAX, and Holley EFI Dominator or HP ECU. The 5-inch digital touch screen...

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...

Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel...

Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel...

Holley ECU Mounting Brackets Holley ECU mounting brackets allow you to comfortably install either the Dominator ECU, Holley HP, Terminator X, or Terminator X-MAX under your Mustang's front passenger...

This harness connects the main Holley harness to the injectors. For EV1 style injectors.

This harness has extra length over the standard Ford harness and is long enough to be installed under the passenger seat on cars such as Fox Mustangs.This harness is for fuel injected small block...