Demco Premier & UL Series 5th Wheel Base Rail & Bracket Kit | 14 Options

The industry-standard bed-rail system. Demco Premier Series mounts use four bolts through the bed to tie the base rails to truck-specific frame brackets underneath; the 6071 rail kit is universal, and the 8552-series brackets are engineered for each truck.

Options

• 6071 — Premier Series base rail kit (universal)
• 6059 — Premier Series side rail kit for Premier / UL Series hitches
• 6003 — ULTRA side rail kit for Premier / UL Series hitches
• 8552000, 8552006, 8552010, 8552011, 8552022, 8552025, 8552028, 8552029, 8552034, 8552036, 8552037 — truck-specific frame bracket kits (8552010, 8552022, 8552029 require drilling)

⚠️ Vehicle Fitment Required

Demco frame brackets and base rails are truck-specific — the same part number fits only the year, make, model, and bed length Demco's application guide assigns it to. Before ordering, confirm the part number against Demco's fifth wheel application guide for your truck, or send us your truck's year, make, model, bed length, and hitch series (Premier, SL, UMS, Hijacker, Autoslide) and we'll verify. Drilling may be required. Ships freight on heavier kits.

Key Features

• Above-bed base rail system
• Four-bolt rail mounting
• Truck-specific brackets
• Limited 5-year warranty

Specifications

• Brand: Demco
• Type: 5th Wheel Base Rail / Bracket Kit
• Series: Premier
• Options: 6071; 8552000; 8552006; 8552010; 8552011; 8552022; 8552025; 8552028; 8552029