MSD Ignition Optional Rev Control for MSD-6 Offroad Ignition

Plugs directly into a special Weather tight Connector on the MSD 6-Offroad Ignition Control. Set an rpm limit that will save your engine from high rev damage during driveline failure. The function is quick and smooth with no harsh backfires or roughness. This is accomplished by randomly dropping spark to individual cylinders, then firing them on the next cycle to prevent loading up in the cylinder. The rev limit is adjustable with special waterproof RPM Modules. Rev Control is completely potted with ResTech compound forming a waterproof seal over the circuits.