Pro Comp 58404 4" Rear Block Kit for GM 1500 88-99 Pro Comp Suspension 58404 Block With U-Bolt Kit; 4 in. Lift; Incl. 2 Cast Iron Riser Blocks; 4 U-Bolts; 8 Heavy Duty Flatwashers; 8 Hi-Nuts; For IFS; Authorized Dealer - 100% Satisfaction Guaranteed Pro Comp Suspension 58404 Warranty: Yes