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When all of this is operating properly, tappet and/or cam wear is held to a minimum. However, in recent years, cast-iron tappets and cam wear reached new heights. Engine builder Brian Tilburg of Tilburg’s Racing Engines explains that, “It’s almost like playing Russian Roulette. You just never know when a cast-iron lifter is going to break and eat the cam.” But using a proven grade of break-in oil and Trend’s new tool steel lifters on a cast-iron camshaft seems to cure the problem. Trend Performance tells us their new tool steel lifters can last four to five times longer than the old cast-iron style and in addition, they can be re-ground if necessary.