K-TUNED BILLET SHIFTER STOPS K-SWAPK TUNED Billet Shift Stops. These stops were designed to prevent over shifting during race inspired gear changes. Over shifting is a problem that can cause damage such as stretched or broken shift cables, worn or broken shift selector parts and even damage to the transmission gears and shift forks. With our stops mounted in place, they will physically stop the shift lever from over extending past the gears and prevent potential damage to all these