New 4-Barrel Front Intake Manifold For Small Block Chevrolet 1955-1986 Aluminum

Dual-plane, low-rise design with a 180-degree firing order greatly improves torque over a wide rpm range for excellent throttle response. Dyno tests showed gains of 5 hp and 9 ft-lbs. From 3000 to 4500 rpm, the power increases averaged 5+ ft-lbs.