MILLISEC Rear Air Helper Spring Kit for RAM 1500 (2011–2018) — Adjustable 5–50 psi, up to 2,100 lb load-leveling

MILLISEC Rear Air Helper Spring Bag Suspension Kit is a bolt-on air-assisted rear suspension upgrade that increases load support and level control for 2009–2024 RAM 1500 models (see fitment notes).

This air helper spring kit adds an adjustable air chamber to the rear suspension so your RAM 1500 handles towing, hauling, and uneven loads with less sag and improved control. Designed as a direct replacement for OEM-style helper springs, the package contains everything needed for installation and gives drivers up to roughly 2,100 pounds of leveling assistance when inflated within the recommended range.

How will these air helper springs change my truck’s handling when towing?

Adding MILLISEC air helper springs reduces rear-end sag and helps maintain a more level ride height under load, which stabilizes steering and braking. Because you can dial in air pressure, the system adapts to varying cargo or trailer weights.

• Adjustable air pressure between 5–50 psi to match load size.
• Up to 2,100 lb of load-leveling capacity when properly inflated.
• Reduces rear squat for improved brake balance and steering feel.

Will this kit fit my RAM 1500 and replace OEM parts?

MILLISEC made these rear helper springs to fit Dodge/RAM 1500 pickups from 2009–2010, 2011–2018, and 2019–2024 Ram 1500 Classic models, but they are not compatible with trucks that already have factory air suspension. The kit is a direct OEM-style replacement tied to part number 60818HD.

• Compatible with specified model years; check vehicle before ordering.
• Not for trucks equipped with factory air suspension systems.
• Direct replacement equivalent to OEM part 60818HD.

What comes in the box and what tools or parts are required?

The MILLISEC kit arrives complete with both air helper springs, mounting brackets, hardware, inflation fittings, tubing, and an installation manual. Basic hand tools are typically all that’s required for installation; some installations may benefit from a lift or jack stands and common sockets and wrenches.

• Includes 2 air helper springs, brackets, bolts, nuts, and fittings.
• Comes with inflation valves, elbow fittings, and tubing for routing air.
• Installation manual included; basic hand tools recommended.

How do I use and maintain the air helper springs for long life?

Keep the helper springs inflated to match your cargo each trip and inspect fittings and mounting points periodically. Regularly check for leaks, corrosion on fittings, and proper bracket torque to ensure reliable performance.

• Set pressure per load; typical range is 5–50 psi for most uses.
• Inspect air lines and hardware periodically for wear or leaks.
• Follow the included manual for torque specs and routing recommendations.

Who is this for? The MILLISEC Rear Air Helper Spring Bag Suspension Kit suits RAM 1500 owners who haul or tow frequently and need a simple, adjustable solution to reduce rear sag and improve vehicle control. It’s ideal for truck drivers wanting a factory-like fit and OEM replacement compatibility (refer to the vehicle fitment list and confirm absence of factory air suspension before purchase).