They work, the truck rides about 1.5 inches higher than advertised, helps A LOT with front end tilt and wobble on my 2000 F250 2WD. I didn't bring any instructions, I somehow got the standard top spring holder to work, although the Super Springs website says it won't (either change it or use the 'included' Super Springs holder , which was NOT included). I bought a brand new spare length Bilstein shock absorber as a set. The Super Springs installation sheet says you need to order longer shocksβ¦