The new FAST XDi Race EFI Distributors? premium quality construction and advanced optical trigger maintain an industry best ?-degree accuracy throughout the rev range: ideal for high RPM EFI applications. Designed for applications that are equipped with a crank trigger, the FAST XDi Race EFI Distributor is a drop-in solution for supplying an accurate camshaft signal to your electronic fuel injection system. Crafted from quality components such as its billet housing, precision ground stainless steel shaft and premium bearings, the XDi Race distributor ensures consistent shaft end-play, while its advanced hall-effect optical trigger supplies the signal. Accurate to ? degree, the FAST XDi Race Distributor?s hall-effect optical trigger is superior to archaic 2-wire inductive pick-up designs. Unlike the competition?s 2-wire pick-ups, the FAST hall-effect optical trigger?s signal output will not fluctuate at high RPM: a must for high-end street and racecars. Featuring durable hand-assembled components, an advanced pick-up design and first in class signal accuracy, the FAST XDi Race EFI Distributor is setting a new standard for EFI distributors. The FAST XDi Race EFI Distributor ships with a high quality rotor, a precision-machined bronze gear and is available in many popular applications with either a small or large diameter distributor cap.