How far can lightening go? Check out this full-boogie race crank for a four-banger. The minimal counterweights are possible since each crank journal only has to support one rod-and-piston assembly, as opposed to the shared journals on V-8s. Naturally, a lightweight rod and piston would be used with this part. Smaller engines don't make as much torque as V-8s, so they have to rely on rpm. It's apparent that very high rpm is the goal of this part.