Carli Suspension CS-DUBK-03-D U-Bolt Kit 4" Axle Tube for 2003-18 Ram 2500/3500

Vehicle Fitment

• 2003-2013 Ram 2500 4WD / 2003-2018 Ram 3500 4WD with 4.00" axle tube - rear axle U-bolt replacement

Features

• Designed specifically for trucks with 4.00" rear axle tube diameter
• Heavy-duty U-bolt set engineered to support lifted and high-load Ram rear suspensions
• Includes correct diameter and length bolts, nuts and washers for proper mounting
• Intended for use with Carli leaf spring upgrades but compatible with stock leaf packs where axle tube matches
• Prevents loosening and sagging under heavy-haul or off-road duty by maintaining clamp force
• High tensile steel construction for durability in demanding applications
• Direct replacement part - retains factory alignment and geometry when installed correctly
• Used by performance and off-road truck builders to ensure rear axle assembly remains secure under extreme use

Specifications

• Manufacturer: Carli Suspension
• Part Number: CS-DUBK-03-D
• Fitment: 2003-2013 Ram 2500 4WD & 2003-2018 Ram 3500 4WD with 4.00" axle tube
• Axle Tube Diameter: 4.00" (100 mm approx.)
• Included Hardware: U-bolts, nuts, washers (quantity per pack)
• Construction: High tensile steel U-bolt set finished for corrosion resistance
• Exclusions: Not compatible with non-4.00" rear axle tube variants (e.g., 4.25", 4.50") unless confirmed

Included Components

• 4x U-bolts sized for 4.00" axle tube (CS-DUBK-03-D)
• 8x Nuts & Washers for installation

Product Description

The Carli Suspension CS-DUBK-03-D is a precision-engineered rear axle U-bolt kit designed for 2003-2013 Ram 2500 and 2003-2018 Ram 3500 4WD trucks equipped with a 4.00" rear axle tube. It is built to support heavy duty and lifted suspension systems, where maintaining proper clamp load and alignment of the axle to the leaf pack is critical for safety and performance.

Utilised by performance/truck-lift builders, this U-bolt kit ensures the rear axle remains securely fastened under high stress loads such as towing, off-road articulation, or leaf spring upgrade systems. Proper installation preserves factory geometry and ride height when used with compatible setups.

Ideal for Ram owners who have upgraded their leaf springs, use their truck for heavy towing, or require a robust rear axle clamp solution. Fitment is confirmed through 2018; coverage for 2019-2025 is unconfirmed at time of listing. Please verify axle tube diameter and fitment before purchase.