COMP Cams Magnum Roller Rocker Ford SB

Starting with 8620 chromemoly steel, these Magnum roller rocker arms are built to handle the demands of street performance builds. They are designed for Ford small block engines with a 3/8" stud diameter, specifically the 289 and 351 Windsor engines from 1968 through 1989. This material choice helps prevent flexing, ensuring that you get the most effective valve lift possible from your camshaft. The roller tip design is a key feature, as it significantly reduces friction compared to traditional rocker arms. This not only helps with longevity but also contributes to more efficient operation of your valvetrain.

With a 1.6 ratio, these rockers are engineered to increase the effective lift at the valve, which can lead to noticeable improvements in throttle response and overall engine power. COMP Cams states that these can offer a 15 to 30 horsepower increase over stock rocker arms, making them a popular choice for enthusiasts looking to get more out of their engine, especially when paired with camshafts that have less than 350 lbs of open spring pressure. They fit a wide range of vehicles, including classic Ford Broncos, Mustangs, and F-Series trucks, as well as some older Buick and Chevrolet models.