The Airbag Man Helper Kit RR4599 fits the Holden Colorado RC (2008-2012) leaf spring rear end and adds up to 1000kg of adjustable load support using genuine Firestone air springs. Air pressure runs from 5 to 100 PSI, letting you level the tray from empty to fully loaded and lift ride height by up to 2" when inflated. It's a bolt-on alternative to swapping in heavy-duty leaf springs, keeping factory comfort when unladen. Backed by a lifetime warranty on the airbags and in stock in Australia with fitment support from our team — confirm your exact fitment via our Colorado RC parts finder.
Browse all compatible suspension parts for your Helper Kit Holden Colorado Rc 2008-2012 using our parts finder.
| Make | Model | Series | Years | Configuration |
|---|---|---|---|---|
| Holden | Colorado | RC | 2008-2012 | 4x2 & 4x4, rear leaf spring |
| Holden | Rodeo | KB & TF | 1981-2002 | Rear leaf spring models |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
Because this is an air spring rather than a fixed-rate leaf spring, you don't need to pre-select a load rating — you adjust PSI to match whatever you're carrying on the day. Start around 15-20 PSI for a light load and wind up toward 80-100 PSI for full payload or towing, using rear ride height as your reference point. Common accessories that add constant rear load on a Colorado RC include steel canopies (60-120kg), drawer systems (40-80kg), long-range fuel tanks (up to 80kg full) and towball download from a caravan (200-300kg) — the airbags let you counter any combination of these without a harsh unladen ride.
Fitting the RR4599 kit is a bolt-on job suited to an experienced DIY installer or a workshop, using existing chassis and axle mounting points on the Colorado RC leaf spring rear end with no welding required. We recommend a wheel alignment check after installation, and again whenever you make a significant change to typical load, since correct alignment protects tyre wear regardless of suspension type. Run the airbags through a 500km break-in period, varying PSI and load, so brackets and lines settle in properly. If your Colorado is also due for fresh dampers or front-end work, pair this kit with upgraded control arms so the whole vehicle is working to the same standard.
Airbag Man kits use genuine Firestone air springs, the same brand fitted to factory air suspension on many production vehicles, backed by a lifetime warranty on the airbags themselves. The kits are built around Australian load and towing conditions — tradie utes, caravan tow rigs and touring vehicles — rather than adapted from a generic overseas part. Have a look at the full Airbag Man suspension range to see helper kits and full air suspension systems for other 4WDs and utes.
This kit suits Colorado RC owners who carry a variable load — tradespeople running tools and materials through the week, and grey nomads or weekend tourers towing a caravan or camper trailer. If you've noticed the rear sagging with a canopy or toolbox fitted, or headlights pointing skyward when loaded, this airbag suspension kit gives you an adjustable fix rather than a fixed heavy-duty spring that rides hard when empty.
The Airbag Man Helper Kit RR4599 is in stock at 4WD Suspension Australia for fast dispatch, with our team on hand to confirm fitment for your Colorado RC or talk through pairing it with other rear-end upgrades. Browse our full lift kit range or get in touch if you're unsure which setup suits your load.
New to Colorado suspension? Read our guide to common Colorado suspension problems and how to fix them.
Yes — the RR4599 helper kit is designed specifically for the Holden Colorado RC built 2008 to 2012, in both 4x2 and 4x4 configurations with the factory rear leaf spring setup. It also fits Holden Rodeo KB and TF models from 1981-2002 on rear leaf spring configurations. Because leaf spring mounting points changed little across this era, fitment is straightforward with the supplied brackets. If you're unsure of your exact build, check our parts finder or contact our team with your rego or build details for confirmation.
This is a helper kit, not a fixed lift kit, so ride height is adjustable rather than a single fixed figure. Inflated to full pressure you can raise the rear by up to 2", and deflated the vehicle sits back at factory ride height for daily driving. This adjustability means you get extra clearance only when you need it — loaded, towing or on rough tracks — rather than living with a permanently raised rear end.
The RR4599 kit includes two Firestone air springs, mounting brackets, air lines with push-to-connect fittings, chassis-mounted inflation valves and all hardware needed for a bolt-on rear installation. An air compressor and gauge are not included and are sold separately, so budget for one if you don't already carry one for tyres or other airbag systems. Full fitting instructions are supplied with torque specifications for the mounting hardware.
Yes, towing is one of the most common uses for this kit on a Colorado RC. Airbags counteract towball download from caravans (typically 200-300kg) and boat trailers (100-200kg), keeping the rear level and the front tyres properly weighted for steering and braking. Levelling the vehicle when towing also keeps headlight aim correct for oncoming traffic and reduces sway caused by a sagging rear end.
Not as a requirement for this kit — the RR4599 only affects the rear leaf spring end and doesn't change front suspension geometry the way a lift kit does. Some owners choose to upgrade front control arms separately if they're also raising the front or replacing worn components, but it's not necessary purely to run this helper kit. If you're planning front-end work at the same time, our team can advise on compatible control arm options.
A wheel alignment check is recommended after installing the airbags and again whenever you significantly change your typical load, even though this kit doesn't move suspension geometry the way a lift kit does. Alignment protects tyre wear and keeps steering feel consistent, especially if the vehicle is often run loaded or towing. It's a simple check most workshops can carry out alongside the airbag fitting.
Because this kit uses air rather than a fixed leaf spring rate, you don't choose a spring rate up front — instead you adjust PSI anywhere from 5 to 100 to match whatever load you're carrying that day. This gives more flexibility than a fixed heavy-duty leaf spring, which rides firm all the time whether loaded or not. Start light for daily driving and increase pressure as payload or towball weight goes up.
This kit is a load-support system rather than a body or suspension lift, so it doesn't change wheel arch clearance the way a 2" or 3" lift kit would. Tyre size should be assessed against your Colorado RC's factory clearance and any other suspension modifications already fitted. If you're planning larger tyres, talk to our team about pairing this kit with a genuine lift kit for the clearance you need.
The Firestone air springs in this kit carry a lifetime manufacturer warranty against manufacturing defects. Brackets and hardware are covered under standard consumer warranty provisions. Keep your proof of purchase from 4WD Suspension Australia and contact our team if you have any warranty concerns down the track.
Yes — deflate the airbags for factory-style ride comfort during unladen daily driving, then inflate them when you load up or hitch on a trailer. This is one of the main advantages over fitting heavy-duty leaf springs, which ride firm all the time even when the vehicle is empty. Most Colorado RC owners run low pressure day-to-day and only increase PSI when carrying a load.
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