Firestone Coil-Rite Air Helper Spring Kit

2009–2019 Ram 1500 5.7L Hemi / 3.6L V6 / 3.0L EcoDiesel

Part #: 4185

Overview

The Firestone Coil-Rite Air Helper Spring Kit is engineered to enhance the ride quality and handling of Ram 1500 trucks equipped with coil spring suspensions. Designed to fit seamlessly inside your vehicle’s existing rear coil springs, this innovative air helper spring system creates a variable spring rate that adapts to changing load conditions. Whether you’re hauling heavy cargo or towing, the Coil-Rite kit helps level your truck, improving stability, braking efficiency, and overall control.

Ideal for Ram 1500 models from 2009 through 2019 with 5.7L Hemi, 3.6L V6, and 3.0L EcoDiesel engines, this kit offers a customizable air pressure system that allows you to adjust spring stiffness on the fly. This flexibility ensures a smoother, safer ride regardless of load or road conditions.

Key Features

The Firestone Coil-Rite Air Helper Spring Kit combines durability and versatility to meet the demands of daily driving and heavy-duty use. Key features include:

• Fits inside existing rear coil springs for a clean, factory-like installation
• Variable spring rate adjusts air pressure to accommodate different loads and road surfaces
• Supports an additional 500 to 1000 lbs. per set without exceeding vehicle GVWR
• Durable polyurethane air springs resist wear, abrasion, and environmental damage
• Operates reliably in extreme temperatures from -40°F (-40°C) to 180°F (82°C)
• Improves vehicle leveling, braking, and handling under heavy loads
• Simple inflation and deflation process similar to adjusting tire pressure
• Compatible with 2009–2010 Dodge Ram 1500 5.7L Hemi and 3.7L V6, 2011–2018 Ram 1500 5.7L Hemi and 3.6L V6, 2019 Ram 1500 Classic 5.7L Hemi and 3.6L V6, and 2014–2018 Ram 1500 3.0L EcoDiesel

Construction & Design

Firestone Coil-Rite air helper springs are crafted from high-quality, elastic polyurethane that provides exceptional durability and flexibility. This material choice ensures resistance to cracking, chafing, and environmental degradation, delivering long-lasting performance. The air springs are engineered to fit precisely inside your vehicle’s coil springs, maintaining the original suspension geometry and ride characteristics while enhancing load-carrying capacity.

The system’s design allows for easy air pressure adjustments, enabling drivers to tailor suspension stiffness to their specific needs. This adaptability helps maintain optimal ride height and vehicle balance, even when carrying heavy payloads or towing trailers.

Installation & Fitment

The Firestone Coil-Rite kit is designed for straightforward installation with no permanent modifications required. The air helper springs fit inside the existing rear coil springs of compatible Ram 1500 models, preserving factory suspension components. Installation typically involves mounting the air springs, routing the air lines, and connecting to an inflation source. Because the system is self-contained within the coil springs, it maintains a clean appearance and does not interfere with other suspension parts.

This kit is specifically engineered to fit 2009–2010 Dodge Ram 1500 5.7L Hemi and 3.7L V6, 2011–2018 Ram 1500 5.7L Hemi and 3.6L V6, 2019 Ram 1500 Classic 5.7L Hemi and 3.6L V6, and 2014–2018 Ram 1500 3.0L EcoDiesel models, ensuring precise compatibility and optimal performance.

What's Included

• Two polyurethane air helper springs designed for rear coil springs
• Air lines and fittings for inflation and deflation
• Mounting hardware and installation instructions

Ideal For

This Firestone Coil-Rite Air Helper Spring Kit is perfect for Ram 1500 owners who frequently haul heavy loads, tow trailers, or drive on uneven terrain. It benefits those seeking improved ride comfort, enhanced vehicle stability, and better braking performance under load. Whether you use your truck for work, recreation, or daily driving, this kit provides adjustable support to maintain a level stance and safer handling.

Firestone Airide is a major name in air suspension and air helper spring technology, offering solutions like Ride-Rite kits to support load handling and ride stability. For trucks, SUVs, and work vehicles that see towing or heavy cargo, Firestone systems help level the vehicle and improve control without sacrificing everyday comfort.