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Fits 1973-1991 Shovelhead and Evolution Big Twin, Oil pump assembly with late style cover
JIMS created the new "Flow Pro 1" Billet oil pump to increase scavenge oil return volume over stock pumps. Jims uses billet 6061-T651 aluminum for the housings and matched feed and return gears. All parts are CNC machined to exact tolerances. Jims claims an increase pump flow by 18% and return volume by over 20%. Each "Flow Pro 1" pump uses pump gears individually matched to each body to maximize feed and scavenge flow. These precision pumps supercede any stock or aftermarket pump and are used by top engine builders.