Holley manufactures high performance carburetors, manifolds, superchargers, water pumps, throttle body fuel injection and fuel pumps for street and race applications. In producing these parts, Holley prides itself in utilizing the latest technology in a lean environment to provide the highest quality parts at the best value to the customer. CNC programs can be generated on a workstation, directly from a customer's solid model. Each engineering work station is networked to each of the CNC machining centers and CNC turning centers. This configuration provides a streamlined flow of data throughout the factory, as well as data acquisition capabilities. Fixture and tool design can be accomplished in house, utilizing Pro/Engineer software. A computerized PM (preventative maintenance) network application is used to ensure all machinery is performing at the highest level.

Holley's machining departments range from small drilling and tapping centers to large four and five-axis high speed machining centers. Many are equipped with automatic pallet changers to facilitate the highest level of spindle up-time. Also included are CNC turning centers. An in-house tool room and maintenance department is comprised of a CNC wire EDM, CNC die-sinking EDM, Ewag tool grinder, and a host of manual machines.