ICON 33100 99-04 Ford F-250/F-350 1.375in Bump Stop Spacer KitThis Bump Stop Spacer Kit is used to prevent a 3 6 inch Suspension System from over compressing. If your suspension were to over compress you could negative arc your springs causing fatigue and premature sag, as well as bottom out your shocks causing them to leak and fail. These spacers and an inexpensive way to prevent a world of expensive problems. Specification 1999 2004 FORD SUPER DUTY 1. 375" BUMP STOP SPACER KIT Spacer Kit Prop 65 Warning :