Boss Airbag 2503 Bare

The 2400, 2500 and 2600 series are all double-bellow Boss airbags in different diameters and load capacities. 2400 bags are smaller in diameter, 2500 are the most common mid-size bag used in many Load Assist kits, and 2600 bags are larger and suit heavier-duty applications where there is more space available around the axle and chassis.

Triple-bellow airbags such as the 2503 and 2603 are used where you need more travel or a taller free height, typically on vehicles with more than 2 inches of lift or long-travel suspension. They allow the suspension to sit higher at a given pressure while still providing the correct load support.

No, airbags are generally only interchangeable within the same series. For example, a 2500 double-bellow bag can often be swapped for a 2503 triple-bellow bag in a kit designed for that series, but you cannot simply fit a 2600 or 2400 into 2500 brackets. The bracket diameter, bolt pattern and clearances are all designed around a specific series.

Boss airbags typically have a recommended working range of around 5–160 psi, with a recommended test pressure of about three times the maximum working pressure and burst testing well above that. Always refer to the specific bag’s data and never exceed the recommended working pressure in normal use.

Replacement airbags must be installed on the correct brackets with the correct beadlock rings or hardware as designed for that kit. Ensure there is adequate clearance from tyres, exhausts, sharp edges and moving suspension parts, and maintain minimum pressure so the bag does not fold or pinch under full compression or articulation.

The Boss Airbag 2503 is designed for use in applications with a lift height of over 2 inches. It can accommodate taller lifts when used with appropriate brackets or spacers to ensure proper fitment and performance.

The Boss Airbag 2503 is specifically designed for use within the 2500 series and is not interchangeable with airbags from other series. Ensure you are replacing a 2500 series airbag to maintain compatibility and performance.

The Boss Airbag 2503 is ideal for Load Assist kits, providing additional support to existing leaf springs. It helps level and stabilise vehicles when towing or carrying heavy loads, ensuring a safer and more comfortable ride.

The Boss Airbag 2503 features a triple-bellow design, allowing for greater travel and flexibility compared to the standard double-bellow 2500 airbag. This makes the 2503 more suitable for vehicles with higher lift requirements.

When fully compressed, the Boss Airbag 2503 measures 85mm in height and has a maximum diameter of 155mm. This compact size allows for easier installation in tight spaces.