GM HD Front Lower Bump Stops (KR1426)Over time, factory bump stops wear out from repeated suspension contact,especially in heavy duty applications. Once cracked or deteriorated, they can no longer cushion the lower control arm, leading to harsh impacts and potential suspension damage. The Kryptonite Front Lower Bump Stops are a direct replacement designed to restore proper suspension function and protect your front end components. If your OEM stops are cracked or missing, its time to