RETRUE 2500lbs Air Spring Replacement for Firestone 6401 with Air Fitting & Bolts (1 Pack)

The RETRUE Air Bag Replacement for Firestone 6401 is engineered to restore suspension performance, towing stability, and load-leveling support for trucks, trailers, and heavy-duty towing setups. Designed with a durable double bellows air spring design, this replacement air bag provides up to 2,500 lbs of load leveling capacity, helping reduce rear-end sag, trailer sway, suspension bounce, and uneven ride height while towing or hauling heavy cargo. This heavy-duty air suspension replacement bag features reinforced rubber construction for long-lasting durability under demanding road and towing conditions. The adjustable 5-100 PSI air pressure range allows drivers to customize suspension support based on trailer tongue weight, cargo load, or road conditions, helping improve steering response, braking stability, and overall towing control. Compatible as a replacement for Firestone 6401 air spring systems, this air helper spring replacement is ideal for restoring worn or damaged suspension air bags on trucks, RVs, trailers, and utility towing applications. The included air fitting and mounting hardware simplify installation and maintenance. Whether you are towing a camper, hauling heavy equipment, or upgrading your suspension support system, the RETRUE load leveling air bag replacement delivers reliable pressure support, smoother ride quality, and enhanced towing performance for heavy-duty applications.