Mallory has the quietest and best performing pump on the market. This pump is perfect for all applications, high performance street, drag racing or oval track , where a high performance electric fuel pump is needed. This pump is good for 700 HP and up engines. This pump must be used with a return regulator part number's 4200, 4201, 4300m, 4301 or 4316m for best performance. For Alcohol and Methanol Use Only.