If you're running a crank trigger system with the magnets installed in the trigger wheel, the FAST® Non-Magnetic Crank Trigger Pickup is a more accurate, highly reliable replacement sensor. It is designed to replace a common non-magnetic pickup with a 3/4"-16 UNF threaded housing. The FAST® sensor produces the most precise signal from cranking through redline RPM and is accurate to within ± 0.1°! There is also a useful LED built-in that is extremely helpful when setting up the static timing before firing up the engine. The wiring is sealed inside the housing and routed into a shielded, 3-pin Deutsch connector