Performance Parts

The Multi Map Selector is designed specifically for use with Holley Dominator EFI systems (not HP). It allows for up to four different calibrations (Global Folders) to be selected at vehicle key-on (startup). The switch is connected into the J3 EC...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimit...

Dominator EFI GM Dual Drive-By-Wire HarnessSpecs: Brand: Holley EFI Category: Air and Fuel Delivery Emission Code: 3 Harness Application: GM, LSX Harness Type: Drive-By-Wire Part Type: Fuel Injection Harness Product Type: Drive By Wire Harn...

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimi...

J4 ECU Connector26 User Programmable Inputs and OutputsSpecs: Brand: Holley EFI Category: Ignition Emission Code: 3 Harness Type: Auxiliary Part Type: Ignition Harness Product Type: J4 Auxiliary Input/ Output Harness - Connector Sub Categor...

J3 ECU Connector17 User Programmable Inputs and OutputsSpecs: Brand: Holley EFI Category: Ignition Emission Code: 3 Harness Type: Auxiliary Part Type: Ignition Harness Product Type: J3 Auxiliary Input/ Output Harness - Connector Sub Categor...

J2B ConnectorFour Additional Injector Driver OutputsFour Additional Coil Driver Outputs23 User Programmable OutputsSpecs: Brand: Holley EFI Category: Ignition Emission Code: 3 Harness Type: Auxiliary Part Type: Ignition Harness Product Type:...

Used when adding a second wide band oxygen sensor to a Dominator EFI installation.Features: J2A Connector #2 Wide band oxygen sensor harness (Fully Terminated) 23 user programmable input wires with pre-crimped ECU pins Specs: Brand: Holley EFI C...

Terminated Vehicle Harness For Digital DashSpecs: Brand: Holley EFI Category: Electrical, Lighting and Body Emission Code: 5 Part Type: Dashboard Wiring Harness Product Type: Digital Dash Harness / Adapter / Module Sub Category: Wire, Cable ...

I/O Adapter w/Unterminated Vehicle HarnessFeatures: Provides (10) addiitonal inputs/outputs to the 7" digital dash Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units Includes USB memory stick to update digit...

I/O Adapter w/Terminated Vehicle HarnessFeatures: Provides (10) addiitonal inputs/outputs to the 7" digital dash Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units Includes USB memory stick to update digital...

Replacement I/O Adapter for Digital Dash.Features: Replacement adapter Input/Output Included USB drive Black color Specs: Brand: Holley EFI Category: Vehicles, Equipment, Tools, and Supplies Color: Black Emission Code: 5 Grade Type: Performan...

Have you been searching for a reason to discard your old noisy mechanical speedometer cable? If so, the Holley GPS Module for our 7" Digital displays should be the next addition to your project vehicle. Featuring a simple plug and play installatio...

Holley does it again with their new die cast aluminum fuel pressure regulators. The same Holley quality that you expect at a price point that every budget can handle.The regulator contains 3/8" NPT in/out ports, a 3/8" NPT return port, a 1/8" NPT ...