F4B Small Block Ford Intake Manifold

The Edelbrock F4B intake manifold is engineered to enhance performance for Small Block Ford engines, offering a blend of vintage aesthetics and improved power. This dual-plane manifold is a reproduction of the classic Cobra intake, known for its ability to increase horsepower and torque. Distinguishing features between F4B iterations include the carburetor mounting pattern, with early models utilizing a 4-holer setup and later ones featuring two oval inlets. Thermostat housing configurations also varied, with early units (pre-1966) incorporating a recess in the manifold and later models (1966 and newer) having a flat manifold surface with the recess in the housing. Additionally, some very early F4B manifolds did not include throttle linkage bolt-down provisions and were found with either HolleyAFB mounting holes or just four carb stud provisions. While the F4B provides a performance uplift over stock cast-iron manifolds, especially in the mid-to-high RPM range (above 3500rpm), it may yield less low-end torque. Some enthusiasts find it outclassed by modern designs like the Edelbrock Performer RPM, which addresses flow balance issues present in the original Cobra design. However, the F4B remains a popular choice for those seeking a period-correct look and solid performance gains for street applications. This intake manifold was notably used on the 1979 Mustang Pace car and was re-issued in the 1980s with the Ford Motorsport logo. It is generally recommended for street applications and can reportedly run to 6000 RPM and beyond.