This Rev Control allows you to set an RPM limit that will save your engine from overrev damage in the event of driveline failure, a slick spot on the trail or missed shifts. The RPM limit is adjustable with special Weather-tight RPM Modules and is supplied with 4000, 6000, and 8000 RPM modules. Like the 6-Offroad Ignition, the Rev Control is completely potted with Ciba compound forming a waterproof seal over the circuits.