HOLLEY HI-RAM (DUAL 4150 TB)
Like the single throttle-body version, the dualquad Hi-Ram excelled at high-rpm power production. In fact, it took top honors in this test by producing 619.9 hp at 6,900 rpm. Obviously, the combination required more airflow than the single throttle-body could muster, so the dual 4150 throttle-bodies allowed the system to breathe. There was also a slight change in the plenum volume between the two tops for the Hi-Ram. Equipped with the dual 4150 throttle-bodies, the Hi-Ram produced 619 hp and 515 lb-ft of torque.