Our new billet aluminum oil pump is the same design used in the Hemi Pro Stock and Top Fuel engines. The rotors in this pump are not only made taller (like a regular high volume style pump) but they are also increased in diameter, making them as large as you can possibly fit under the pump cover. This results in a pump which will EASILY flow over 19 gallons per minute of oil, which is an amazing amount of oil. And because of the newer, more rounded design of the rotors, they are able to pump this amount of oil while using up less horsepower than the standard style pumps. AND - less horsepower driving the rotors also has the added benefit of being easier on the drive gear, meaning your bronze distributor gear (if you are using a bronze one) will have a much extended life on the street. While a regular "high volume" pump gives you about a 25% increase in volume, at over 19 gallons per minute, these could be considered a "SUPER high volume pump. These larger rotors also require a larger diameter o-ring, which is included with the pump. Overall, for the best looking, highest quality, best performing oil pump, these just cannot be beat. Great for the track as well as for street use. These can be used with standard cast iron type covers, or use our 200-1180 Aluminum cover to make a fully billet aluminum pump.