I HAVE THE RC 4.5. THE ADD A LEAFS THAT CAME W/THE KIT DID NOTHING SO I SWAPPED THEM OUT FOR THE SPRING PACK. TWO YEARS LATER THEY HAVE SETTLED ABOUT 1 1/2", BUT WITH THE LONGER SHACKLES IT ACTUALLY SITS LEVEL NOW AND DOESN'T LOOK LIKE A STINK BUG. I ALSO RUN A LOT OF WEIGHT W/TOOLS AND SUCH IN...