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This simple kit allows you to repair all four sliders found within your two factory L5P Duramax ECM wiring harness connectors. The factory connector uses a plastic slider to lock the harness connector to the factory ECM. These sliders often become...

Specs: Brand: Simpson Racing Category: Oil, Fluids and Chemicals Emission Code: 6 Part Type: Multi-Purpose Cleaner Product Type: Molecule Sub Category: Cleaners and Removers

Unlock your truck’s full capability with the EFILive AutoCal V3 DPF Delete Tuner, complete with JS Speed custom tuning. Built for GM Duramax 6.6L engines, this tuner delivers horsepower gains, improved fuel economy, and real-time control, ensuri...

Specs: Brand: Simpson Racing Category: Oil, Fluids and Chemicals Emission Code: 6 Part Type: Multi-Purpose Cleaner Product Type: Molecule Sub Category: Cleaners and Removers

Specs: Brand: Simpson Racing Category: Oil, Fluids and Chemicals Emission Code: 6 Part Type: Multi-Purpose Cleaner Product Type: Molecule Sub Category: Cleaners and Removers

Power, Reliability & SOTF Flexibility Unlock the full potential of your Dodge Ram Cummins 5.9L & 6.7L engines with the EFI Live AutoCal Tune Package. Designed with custom tune files and optional SOTF (Shift-On-The-Fly) switch integration, ...

Regulator Rebuild Kit for 1 bbl, 2 bbl, & 4 bbl Holley TBI regulators.Holley's regulator rebuild kits include everything needed to rebuild your billet fuel pressure regulator back to new.Includes diaphragm assembly, gaskets and rebuild instruc...

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory...

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory...

Designed to release and extract the terminals from the connector housing when wiring or repairing your vehicle. This de-pinning tool also includes 10 connector plugs to provide a weather proof and clean installation.Features: Metripack De-pinning ...

Looking for a plug and play kit for your Ford Modular engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Is your cam too wild for a MAF? Power adders? You name it, and Holley EFI can handle it....

Holley's Sniper Stealth 4150 Master Kit gives you carburetor styling but functions just like the Sniper! A 4150 stealth is a great way to upgrade your ride to fuel injection in a cost-efficient way with just 4 simple connections required. Take you...

Take control of your 302ci Small Block Ford engine in your Fox Body Mustang with Holley EFI Terminator X system. Don't settle for the factory ECU with a cumbersome tuning interface or pre-programmed tuning chip when you can have complete control o...

Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, n...

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory...

Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engi...