All Products

These two new MAP sensor adapters from Holley EFI allow you to quickly add a stainless steel MAP sensor to your existing installation. Holley part #558-466 adapts harnesses with a (MPFI) Weatherpack 3-pin connector to the 3-pin Delphi GT connector...

Get that perfect fit for your Devil Ray 3.0 helmet with this cheek pad set.Specs: Brand: Simpson Racing Category: Vehicles, Equipment, Tools, and Supplies Emission Code: 6 Part Type: Helmet Cheek Pad Product Type: Cheek Pa...

Get that perfect fit for your Devil Ray 3.0 helmet with this ear pad set.Specs: Brand: Simpson Racing Category: Electrical, Lighting and Body Emission Code: 6 Part Type: Headphone Ear Pad Product Type: Ear Pads Size: ...

Get that perfect fit for your Devil Ray 3.0 helmet with this top/crown pad.Specs: Brand: Simpson Racing Category: Vehicles, Equipment, Tools, and Supplies Emission Code: 6 Part Type: Helmet Top Pad Product Type: Top Pads ...

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 ...

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...

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...

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...

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...

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 ...

Put the power back where it belongs. If your Cummins-powered Ram is experiencing slow spool, inconsistent boost, or declining performance, a worn turbocharger may be the cause. These direct-fit replacement turbo options are engineered to restore d...

Max airflow. Max performance. Built for Cab & Chassis.This turbo-back exhaust system is engineered to deliver serious gains for off-road Cummins builds. Featuring a full 5-inch design in corrosion-resistant T409 stainless steel, it removes all...

Streamline your tuning and diagnostics with the Dodge RAM Smart Access Cable, engineered for 2018+ Dodge, Jeep, RAM, and Chrysler models. This tool is essential for advanced ECU and TCM functions, including read, write, and special operations. It...

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...

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:...

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...

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...

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...

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 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...