This Flow Pro 1 will give an increase in oil return (scavenge) volume over stock pumps, thus increasing horsepower by decreasing drag on the flywheels and other rotating parts. Choice of end cover for custom or stock oil line connections. Cover and body are polished billet 6061-T651 aluminum CNC machined to exact tolerances for the most durable, strong and wear-resistant oil pumps. Matched feed and return gears individually matched to each body. Available for late 1973-later single cam Big Twins. Use on 74 inch to 140 inch motors, 1981-later bolts on with no modification. Note