Edelbrock part #2665 Performer 351-4V intake manifold is designed for street 351C and Boss 351 Fords that came stock with 4V carb and heads. Manifold will fit Boss 302 or accept stock Motorcraft spread-bore carb. End-seal flange width measures 6-31/32". Edelbrock's Patented Dual-plane, low-rise design with a 180-degree firing order greatly improves torque over a wide rpm range for excellent throttle response from off-idle through 5500rpm. This Performer intake manifold is ideal for passenger cars, trucks, 4x4s, tow vehicles and RVs.