Polished version of Edelbrock PN[2101], for idle to 5500 RPM street-driven performance, dual-plane low-rise intake with 180 degree firing order, patented runner design ensures broad torque curve, excellent throttle response and mid-range power, 50-state street legal if correct carburetor used, accepts late-model choke, waterneck, and HEI, accepts a/c and alternator