
Reach us here or email info@4x4downunder.com.au
Boss Extreme Series Airbags – Built Tough for Your Next Adventure
Ready to take your 4x4 to the next level? The Boss Extreme Series airbags are rated at 2500lb (1136kg) per side and have been government-approved, tested to handle over 750psi. Manufactured in-house and proudly branded by Boss, you can count on superior quality—unlike unbranded imports that often fall short.
Whether you’re loaded up for a camping trip or tackling off-road tracks, most dual cab utes run at 15-45psi depending on the load. With over 13,000 load assist kits sold across Australia, these airbags have proven themselves time and again with 4WD enthusiasts, tradies, and tour operators. They’re tough enough for anything from agricultural vehicles to motorhomes and trailers.
For the smoothest ride, simply inflate your airbags enough to reach a level ride height. This helps spread the load evenly across your suspension system, keeping things balanced and preventing any unnecessary strain.
We're Australians, and we like to support our fellow Australians, which is why all our products are sourced locally from the official Australian distributors. Nothing is imported directly and we don't stock any grey imports. This also means that all manufacturer warranties are fully honored by the brands themselves.
Quick shipping and the Runva red premium was as described. Excellent product, would highly recommend.
I needed various accessories for my Luna fridge, and they had the accessories I needed.
I haven’t had a chance to put them on yet because my auto box went bang on way back up north from Brisbane ….but the mirrors look great out of the box
Paired perfectly with my runva winch and saved me a lot of money and effort installing a new winch
Although I have been out on the trails I haven't had to use the winch at this stage. The 11xp certainly looks the goods. Very happy with the fact this kit came with hand held, in cab and wireless remote.
NO COMPLAINTS AT ALL