Pro Comp 50165 Rear Dana 60 U-Bolt Kit for GM 2500 '73-'87 Pro Comp Suspension 50165 U-Bolt Kit; 4 in. - 6 in. Rear Lift; Incl. Hi-Nuts; Extra Thick Washers; Authorized Dealer - 100% Satisfaction Guaranteed Pro Comp Suspension 50165 Warranty: Yes