US Motor Works

About US Motor Works

Founded in 1995 and headquartered in Santa Fe Springs, California, US Motor Works has spent three decades building a reputation as one of the automotive aftermarket's most dependable sources for precision-engineered engine components. Celebrating 30 years in business in 2025, the company has grown from a focused cooling-system specialist into a full-service manufacturer serving both passenger car and heavy-duty commercial applications across North America.

Quality at US Motor Works begins with skilled technicians utilizing materials that meet or exceed OEM specifications to manufacture premium water pumps and fan clutches. That commitment doesn't stop at the workbench — specially trained technicians apply stringent quality control standards utilizing sophisticated technology to make sure that all US Motor Works products meet the rigorous demands of customers. The company is also ISO 9001:2015 certified , underscoring its dedication to repeatable manufacturing excellence.

Engineering & Manufacturing Philosophy

US Motor Works has created an engineering and technical environment from the design process to the final production product, starting with CAD/CAM 3-D projections, computerized testing, a complete manufacturing plan, and ending with a reliable distribution network. This end-to-end control means every part that leaves the facility has been tracked, tested, and verified — whether it is headed to a professional repair shop or a dedicated DIY enthusiast.

State-of-the-art manufacturing utilizes four key principles: Supply Chain (improved flow), Quality Management (robust quality assurance), Production (pull & flow and 5S), and Measurements by KPIs (Key Performance Indicators). The result is a product line built to perform reliably under the demanding thermal and mechanical stresses of modern engines.

Core Product Categories

US Motor Works manufactures a complete line of water pumps and fan clutches — the two components that work in tandem to keep an engine operating at a safe temperature. The brand's engine cooling fan clutches are among its most recognized products, designed with quality in mind, with all product applications tested to meet or exceed original equipment specifications, using the highest quality materials to create the most superior product available in today's market. Notably, fan clutch mounting surfaces are CNC machined, and tap and drilled for precise OE-spec fitment.

Equally important to any cooling system service are engine water pumps. US Motor Works assembles electrical and mechanical water pumps using materials that meet or exceed factory specs. For technicians who prefer a complete, matched solution, the brand also offers engine water pump kits — a proper water pump replacement that includes a new fan clutch, since the two are connected to the same shaft and work together to move air and cooling fluid, as replacing one without the other can damage the new part and cause repeat work or engine trouble.

Beyond cooling, US Motor Works has expanded significantly into fuel delivery. The brand manufactures premium high-quality automotive and heavy-duty fuel pumps, water pumps, fan clutches, timing kits, and other cooling products. Its fuel pump lineup spans in-tank modules, universal inline pumps, and high-pressure GDI fuel pumps that deliver precise fuel directly to the combustion chamber for improved efficiency and power, with 50+ high-pressure GDI fuel pumps now available.

Why Choose US Motor Works?

• 30 years of manufacturing experience in engine cooling and fuel delivery
• ISO 9001:2015 certified manufacturing processes
• Products designed, engineered, and tested to meet or exceed OEM specifications
• Coverage for both automotive and heavy-duty commercial applications
• CNC-machined components for precise fit and long-term reliability
• Continuous product line expansion, including GDI fuel pump technology