These shocks ride much better than the Bilstein 5100. As soon as I put the 4600 on I could feel a big difference. I will never go back to those hard 5100s. My shocks came in two different orders. The first order was the rear shock absorbers, a few days later the front ones appeared. I was concerned and emailed the seller and he responded within minutes letting me know the second pair of shocks were on the way and gave me a tracking number. 2003 Ram 2500 4x4 Cummins truck.