Assault Racing Products PC4001 Small Block Ford Dual Plane Satin Aluminum Intake 1500-6500 RPM SBF 260 289 302 RPM Range: 1500 - 6500 Dual Plane - 260-302 Manifold Height: 4.12 in Square bore carb bolt pattern for the Holley 4150/4160 style carburetor Bridged rear water crossover passage to equalize flow and help keep temperature lower