Aeromotive billet pump controller Billet Fuel Pump Controller For any pump, on any type of vehicle, this voltage stepper is like an automatic transmission for your electric fuel pump. Whether you?re just cruising or running at Wide Open Throttle (WOT), Aeromotive?s Billet Fuel Pump Controller senses engine RPMs, then automatically delivers the correct voltage to the Fuel Pump. An adjustable controller lets you calibrate the desired RPM level for your specific application. Controller features: LED indicator confirms correct ignition signal hookup, verifies energization of the manual override circuit, and indicates that the circuit is providing full voltage to the pump. A solid-state transistor circuit replaces the relays recommended in most fuel pump electrical circuits. Cool operation ? mount it virtually anywhere. Housing crafted from billet 6061-T651 aircraft aluminum alloy, protected with a beautiful bright dip red anodized finish. Complete installation kit ?wire, override toggle switch, installation hardware, and instructions included.