Necessary no, but I wouldn’t be without it. There are so many great accessories/modifications out there for the P5 that many of the commenting members have given awesome reviews and recommendations, but sortIng out how u think u will use the machine is critical in selecting which ones. I use my machine for hunting, plowing & mowing with a pull behind brush mower. 3 months of mowing at speeds under 5 mph maneuvering in the woods without PS and an Elk hunt in CO with the bump steer issue in rocky terrain. I personally wouldn’t wait 3 months again to install it. Best modification I have.