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Aeromotive 16306 - Pump Speed Controller coupon_3 Afco Racing Products 40016 -Aeromotive 16306 Pump Speed Controller Fuel Pump Controller Billet Fuel Pump Speed Controller Adjustable Each For any pump, on any type of vehicle, the Aeromotive Fuel Pump Speed Controller (FPSC) minimizes fuel heating and vapor lock problems by matching the duty cycle of the fuel pump to engine RPM. At low demand, the FPSC slows the fuel pump down, reducing the chance of suction side cavitation and vapor lock. When demand increases, the FPSC returns