2003–2013 Dodge Ram 2500 / 2003–2012 Ram 3500 4WD Diesel 6” Multi-Rate Front Coil Springs

Upgrade the ride quality and performance of your lifted Ram with the Carli Suspension 6” Multi-Rate Front Coil Springs. Designed specifically for diesel-powered 2003–2013 Ram 2500 and 2003–2012 Ram 3500 4WD trucks, these premium front coils provide a true 6-inch lift while dramatically improving ride comfort, suspension control, and off-road capability.

Unlike traditional linear-rate lift springs, Carli’s custom multi-rate design delivers a smooth, compliant ride during normal driving while progressively stiffening under heavier loads, hard braking, aggressive cornering, and off-road use. This allows your truck to remain comfortable on the street while maintaining the control and stability needed for demanding terrain.

Key Features

Provides true 6” front lift height

Multi-rate spring design improves ride comfort and control

Progressive spring rate softens small bumps and road imperfections

Increased stiffness under compression improves stability during off-road driving and hard braking

Custom wound coil design engineered specifically for diesel Ram applications

Shot peened and hydraulic pre-set to reduce spring fatigue and sagging

Durable black powder-coated finish resists corrosion and wear

Designed to withstand full coil bind without deformation

Excellent upgrade for existing 6” lift systems or complete Carli suspension setups

Made in the USA

Vehicle Fitment

Fits the following 4WD diesel models:

• 2003–2013 Dodge Ram 2500 4WD Diesel
• 2003–2012 Dodge Ram 3500 4WD Diesel

What’s Included

• (2) Carli 6” Multi-Rate Front Coil Springs

Installation Notes

• Designed for diesel engine applications only
• Professional installation is recommended
• Intended for use on 4WD trucks
• Compatible with Carli 6” suspension systems and many existing 6” lift setups

Why Choose Carli Multi-Rate Springs?

Carli’s multi-rate coil technology is designed to provide the best balance between daily driving comfort and high-performance suspension control. The progressive spring rate allows the coils to remain soft and compliant over small bumps while automatically increasing stiffness as suspension load increases.

This creates a noticeably smoother ride on-road while improving confidence and handling during towing, off-road use, cornering, and rough terrain.