The Magnum Roller Rocker Arm is a precise aftermarket replacement component that is patented and produced by industry giants, COMP Cams. Created for the serious performance enthusiast, the Magnum Roller Rocker Arms are considered the ultimate rocker arm in the market. These rocker arms go through scrupulous design procedures and are constructed using COMP Cams' accurate methodology to ensure qualities of longevity, durability, and reliability. Built from 8620 chrome-moly steel, the Magnum Roller Rocker Arm is considerably stronger than die cast aluminium or stamped steel rockers. The Magnum Roller Rocker Arm features a stiff design and an accurate ratio that maximizes the valve lift. COMP Cams offers Roller Rocker Arms in different sizes and styles to make certain that users have a set that can fit specific engine combinations.

Competitions Cams, Inc., commonly known as COMP Cams, is a world-leading aftermarket automotive parts manufacturer. COMP Cams was founded in 1976 and then incorporated in 1977. COMP Cams' headquarters is established in Memphis Tennessee and they also have five manufacturing locations spread across the United States. COMP Cams began building a name for itself by selling valve train products via satellite distribution stores. Over the years, COMP Cams has acquired several companies that manufacture transmissions, electronic fuel injection, and nitrous oxide. As of today, COMP Cams comprises a total of 13 companies with hundreds of employees. The company is a major mover in the automobile industry, developing superior and state-of-the-art techniques and methodologies that have become a standard in various competitions such as NASCAR. The technological advancement and innovations enable COMP Cams to manufacture premium aftermarket performance parts that are compatible with leading high-performance vehicles. COMP Cams' products are also the go-to brand of hot-rod enthusiasts, engine builders, and professional racers.