Universal - Manual Boost-Referenced Timing Control 1979-chevrolet-caprice-esi8973500 Wheel Hub - Grand National

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Universal - Manual Boost-Referenced Timing Control 1979-chevrolet-caprice-esi8973500 Wheel Hub - Grand NationalA 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.