Easy way to convert stock ignition systems to single-fire system Kits feature Compu-fire ignition module, high-output single-fire Fire coil which mounts in the stock location and under the stock coil cover, and a set of silicone-jacketed spiral-core spark plug wires Ignition modules feature eight pre-programmed advance curves Tunable VOES adds 5 or 10 degrees vacuum advance Easy installation with LED static timing light Selectable rpm limiter from 6000 rpm to unlimited Made in the U.S.A. Not for fuel-injected models.. IGNITION SINGLE FIRE E/S