Airbag Suspension for Toyota Hiace Van H300 2019+(Clearance kit)

No. A Boss Load Assist kit does not increase your GVM. It supports and levels the vehicle within the factory limits so it sits and tows correctly, but the legal carrying capacity is still set by the vehicle’s original GVM and rear axle ratings.

On vehicles, Boss Load Assist kits are plumbed as a dual-path system so the left and right airbags cannot transfer air between them. This stops the vehicle leaning or feeling unstable in corners. Linking left and right together allows air to move from the loaded side to the unloaded side, which can cause body roll and poor handling.

Yes, but the setup depends on your lift height. Standard 2500 or 2600 double-bellow bags work on stock height and lifts up to around 2 inches. For more than 2 inches of lift you generally need triple-bellow bags (2503 or 2603) and/or different brackets or spacers. The best approach is to measure the gap at the bump stop at your desired ride height and confirm the correct kit with Boss.

LA Clearance kits are standard Boss Load Assist kits that may have minor cosmetic marks, small scratches or packaging damage. The structural components, testing, performance and warranty are the same as the non-clearance kits. They are simply offered at a sharper price because they are not cosmetically perfect.

Yes, provided you stay within the same airbag series. For example, if your kit uses 2500 airbags and you add more than 2 inches of lift, you can normally upgrade to 2503 triple-bellow bags that suit the same bracket pattern. Airbags from different diameter series (e.g. 2400 vs 2500 vs 2600) are not interchangeable unless the kit is specifically designed for that change.

Boss airbags are manufactured using a proprietary blend of cured natural rubber, hi-tensile steel cords and ballistic reinforcing. They are independently tested to a recommended test pressure around three times the maximum working pressure, and burst-tested even higher. In load assist applications it is virtually impossible to pull the bag apart from the bracket because the bead is clamped by a solid aluminium ring, rather than relying on crimped plugs.

Boss airbags are attached to the mounting brackets using an aluminium clamping ring that acts like a beadlock. The ring clamps the bead of the airbag directly to the steel plate so the bag is mechanically locked in place. Many other brands, including big names like Firestone and Dunlop, use plastic or metal end plugs crimped into the bellows. Under extreme droop (for example on a hoist or heavy articulation), those plugs can be pulled out of the bag. With the Boss beadlock-style design, the bag cannot be pulled off the mounting plate in normal service.

Most competent DIYers can install a Boss Load Assist kit with basic tools in 2–3 hours. The brackets are vehicle-specific and generally bolt to existing chassis points. You need to be comfortable working safely under the vehicle, routing airlines away from heat and moving parts, and setting basic alignment. If in doubt, a suspension or 4x4 workshop can fit the kit for you.

Do not run the bags completely empty. A minimum of around 5–10 psi is recommended when the vehicle is unladen. This keeps the bag in shape and protects it from pinching or chafing under full articulation.

The Boss Airbag Suspension for the Toyota Hiace Van H300 is designed to assist with load leveling and stability, typically accommodating a lift of up to 2 inches. For lifts greater than this, you may need to consider using triple-bellow airbags or additional spacers.

The recommended air pressure for the airbags generally ranges from 15 to 45 psi, depending on the load you are carrying. It is best to inflate the airbags just enough to achieve a level ride height, allowing the vehicle's suspension components to share the load evenly.

Yes, the Boss Load Assist Kit is ideal for towing, as it helps maintain a level ride height and improves stability while carrying heavy loads. This ensures that the vehicle sits correctly and tows safely, enhancing overall performance.

This clearance kit is a shop-soiled version, meaning it may have minor cosmetic imperfections but still comes with a full warranty. It includes the same high-quality components as standard kits, such as the Boss Extreme Series Double Bellow Airbags, but at a potentially lower price due to its condition.

While the kit comes with detailed fitting instructions, professional installation is recommended to ensure proper setup and performance. This is particularly important for achieving the correct air pressure and ensuring the airbags are installed correctly for optimal load distribution.

Boss airbags are constructed from high-quality materials and are rated for a maximum working pressure of over 750psi. They feature a beadlock-style aluminium clamping ring, ensuring a secure and durable connection to the mounting plates, which enhances their reliability compared to other brands.

It is advisable to check the air pressure in the airbags regularly, especially before towing or carrying heavy loads. Regular maintenance ensures optimal performance and safety, allowing you to adjust the pressure as needed based on your load conditions.