Review on Monroe 557004 Shock Absorber: Pioneering Performance and Superior Dampening by David Golden

Almost half the price of NAPA. Napa uses the exact same part number and classifies these 557004 shocks as heavy duty and I found them to look more reliable than the old ones. They drove right in a vintage 1983 Georgie Boy van on a GM P30 chassis. These rear shocks had a plastic loop to keep them from stretching during shipping that I left in place until I hung them and then removed them with a pair of dams. I haven't installed the front yet and haven't ridden it yet. Fingers crossed for them to help with the RV's rocking performance in high winds which can scare you at times.