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2 This cam is also unique in its design. Comp calls this the “Lobe Locker,” and as you can see it connects the lobes on either side of each journal to help provide extra rigidity. With aggressive cam lobes and strong valvesprings, it’s getting more and more difficult to keep flat tappet lifters from grinding off the nose of the cam lobes. Comp’s engineers say that any flex in the cam caused by the increased pressures placed on it can contribute to lobe damage, and the Lobe Locker design helps protect against precisely that.