COMP Cams Solid Lifters American Motors1. 79" Seat Height. COMP Cams Solid Mechanical Lifters are the highest quality Solid lifters on the market today. These lifters are manufactured using the tightest tolerances in the industry to ensure peak performance in your application. The crown of the lifter is ground to a precise radius for proper break in and optimum durability, which guarantees a long life. The oil metering band is milled to an exact depth in order to prevent too much oil from