2013 RAM 3500 8' Hard Folding Truck Bed Cover

Premium Low Profile Aluminum Truck Bed Cover

The Longest Working Bed Gets the Strongest Cover — Built for the Mid-Cycle Refresh 2013 RAM 3500

The 2013 RAM 3500 brought a significant mid-cycle refresh to the fourth-generation platform — a new dashboard design, improved Uconnect infotainment system, and enhanced connectivity options. The refresh elevated the interior experience of the RAM 3500 without touching the proven heavy-duty bed architecture — the fourth-generation bed rail geometry carried forward unchanged. For one-ton operators who depended on the 8' Long Bed for maximum payload and maximum hauling length, the 2013 update delivered a more refined cab on the same proven working foundation.

The Thunder Armor Hard Folding Tonneau Cover is precision engineered specifically for the 2013 RAM 3500 8' Long Bed on the fourth-generation platform. Designed and manufactured in the USA by Thunderstone Manufacturing, this premium hard aluminum truck bed cover delivers enhanced cargo security, all weather protection, rugged durability, and a sleek low profile appearance built for real world one-ton truck use.

Whether your truck is used for long material transport, maximum payload hauling, farm and ranch operations, commercial fleet work, gooseneck towing, or heavy-duty one-ton applications, Thunder Armor delivers dependable truck bed protection designed to match the capability of the 2013 RAM 3500 8' Long Bed.

Important: Thunder Armor for the RAM 3500 8' Long Bed does not work with drop-in bed liners. Remove drop-in liners before installation.

Why Choose the Thunder Armor Hard Folding Truck Bed Cover?

• Heavy Duty Aluminum Construction

  Premium grade aluminum panels engineered for the most demanding commercial, agricultural, and one-ton heavy-duty long bed truck use.

• Best in Class Low Profile Design

  Ultra low profile design sits virtually flush with your 2013 RAM 3500 bed rails across the full 8' Long Bed.

• Enhanced Cargo Security

  Secure latch system helps protect valuable tools, equipment, materials, and cargo across every inch of the 8' Long Bed.

• All Weather Truck Bed Protection

  Weather resistant perimeter seal system helps shield cargo from rain, snow, dirt, and road debris.

• Quick No Drill Installation

  Installs in approximately 30 minutes using a no drill clamp mounting system.

• Full Truck Bed Access

  Folding panel design provides convenient access to your full 8' Long Bed while maintaining maximum hauling flexibility.

• Proudly Made in the USA

  Designed, engineered, sourced, and manufactured in the United States.

• 5-Year Limited Warranty

  Built for dependable long term performance and backed by one of the strongest warranties in the category.

• Built for the Refreshed 2013 RAM 3500 Long Bed Operator

  The 2013 mid-cycle refresh brought a more refined interior to the RAM 3500 while the proven fourth-generation one-ton bed platform carried forward unchanged. Thunder Armor fits the 2013 RAM 3500 8' Long Bed with the same precision fitment used across the full 2010–2018 fourth-generation range.

• Platform Note

  The 2013 RAM 3500 uses fourth-generation bed rail geometry. The 2013 mid-cycle refresh did not change the bed geometry. This fitment is for 2010–2018 RAM 3500 trucks only. If you own a 2019 or newer RAM 3500, see the fifth-generation fitment pages.