Boss Airbag 2503 Complete

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 applications requiring a lift of more than 2 inches. It is best suited for vehicles with a lift height of up to approximately 4 inches when paired with appropriate brackets or spacers.

The Boss Airbag 2503 is ideal for 'bag over' applications in automotive suspension, providing enhanced load support for towing and carrying heavy loads. It can also be used in custom suspension setups where additional lift and load stability are required.

The Boss Airbag 2503 features a triple-bellow design, allowing for greater travel and flexibility compared to the double-bellow options like the 2400 and 2500 series. This makes it more suitable for vehicles requiring additional lift and load support.

The maximum working pressure for the Boss Airbag 2503 is 160psi. It has been tested to a pressure of 600psi, ensuring robust performance under load.

When fully compressed, the Boss Airbag 2503 measures 85mm in height with a maximum diameter of 155mm. Its maximum height when fully extended is 335mm.

Yes, the Boss Airbag 2503 can be used in tandem axle trailers. However, ensure that the airbags are linked on the same side to maintain stability and prevent cross-linking, which can lead to handling issues.