Large rotors or gears provide increased oil delivery, as well as large bearing clearances for improved oil pressure. Plus, the increased oil delivery is easily handled by larger inlet and outlet ports. Precision machined cast iron cover plates are standard, along with a black phosphate coated pump housing. SB-Chevy Ultra pump features a big block pump body with longer, larger gears and extra large ports. SB-Chevy pump, #844-224-100R, comes with hex-drive oil pump shaft.
