6-Btm Boost Timing Master Universal Manual Boost-Referenced Timing Control MSD IgnitionA dash mounted control knob lets you adjust the amount of timing retard. It can be adjusted from 0 degrees per pound of boost to 3 degrees per pound (up to 15 degrees). The 6 BTM also shares the Soft Touch Rev Control of the 6AL Ignition for overrev protection. The BTM is supplied with rubber shock mounts and rpm modules for 3,000, 6,000, 7,000, and 8,000 rpm. The 6 BTM is ideal for engines with a turbo or supercharger. Not only will the engine