It is a direct bolt-on, high performance for 4.6 liter modular Mustangs. It is a must have for underdriven pulleys. The pump fits both 2 and 4 valve engines. It offers increased water flow with 8 bladed, stainless steel impeller. It has heavy duty bearing with long life carbon graphite seal. It requires less than 3 horsepower and is perfect for stock or aftermarket pulleys.