Just had 5100s installed all 4. Wow what a difference!!!!! i had the black shocks and at 50,000 miles they were toast! I had the 2 inch Rough Country spacer on also......It was riding terrible!! What an absolute difference I really am impressed. Thing is though the shop installed the Blisteins at the stock setting and kept the spacer on, however it rides so good i think i will just keep it as is. It rides better than it ever did.