The Airbag Man Helper Kit CR5104 adds adjustable air support inside your Jeep Wrangler JK's 120mm ID coil springs, fitting 2-door and 4-door models from 2007 to 2023 across Australia. Air pressure is adjustable from empty to a firm setting, letting you dial in load support for touring gear, roof-top tents or towing without changing your standard ride height. It suits standard, lowered and raised coil spring suspension, so you don't need to swap out your existing springs. Backed by Firestone's lifetime manufacturer warranty, this kit ships from Australian stock with fitment support from our team.
Browse all compatible suspension parts for your Helper Kit Jeep Wrangler Jk using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Jeep | Wrangler | JK 2-door | 2007-2023 | 3.8L V6 Petrol, 3.6L Pentastar V6 Petrol, 2.8L CRD Turbo Diesel |
| Jeep | Wrangler Unlimited | JK 4-door | 2007-2023 | 3.8L V6 Petrol, 3.6L Pentastar V6 Petrol, 2.8L CRD Turbo Diesel |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
This helper kit works with your existing coil spring rate, so there's no spring rate to choose — the air spring simply adds adjustable support on top of what's already fitted. If you're regularly carrying heavy constant loads such as a bull bar, winch, roof-top tent, long-range fuel tank or a caravan tow ball weight, run higher air pressure to keep the rear level. For lighter touring loads or unladen driving, deflate the air springs and let the factory coil do the work.
Fitment is a bolt-in job most experienced DIY installers can complete with basic hand tools, though we recommend professional fitment if you're not confident working around coil springs under load. Wheel alignment is not required for this kit alone since it doesn't change ride height or suspension geometry, but check it as routine maintenance if you've recently had other suspension work done. Bed in the air springs over the first 500km and re-check air line fittings for leaks. If you're also lifting the JK, pair this kit with upgraded control arm upgrades to keep your geometry correct at height.
Airbag Man kits use Firestone air springs, a manufacturer with decades of experience building air spring components for commercial and passenger applications. Every kit is backed by a lifetime warranty on the air spring, and 4WD Suspension Australia carries Airbag Man stock locally for fast dispatch and fitment advice. Tourers and tradespeople across Australia run these kits to keep their JK level under real-world loads — view the full Airbag Man range for other models.
This kit suits JK owners who tow a camper or caravan, carry roof-top tents and drawer systems, or run a tray/tub full of gear for work. If you're chasing more adjustability than a helper spring alone, our full airbag suspension range covers heavier-duty load carrying setups too.
In stock in Australia and ready to dispatch, with fitment support from our team on every order. Browse our full lift kit range if you're planning a height change alongside your load support upgrade.
New to Jeep suspension? Read our guide to common Jeep suspension problems and how to fix them.
Yes, the CR5104 helper kit is built for Jeep Wrangler JK 2-door and 4-door (Unlimited) models from 2007 to 2023 fitted with 120mm ID coil springs. It suits standard, lowered and raised suspension setups without needing a different air spring size. If you've fitted aftermarket coil springs with a different internal diameter, check with our team before ordering. We can confirm fitment against your exact model and spring setup.
This is a helper kit, not a lift kit — it doesn't raise your Jeep's ride height on its own. The air spring sits inside your existing coil spring and only adds load-levelling support when inflated, keeping your factory or aftermarket ride height unchanged when deflated. If you want an actual lift, pair this with our lift kit range instead or alongside this kit.
The kit includes 2 x Airbag Man air springs sized for 120mm ID coil springs, top and base mounting plates, a nylon air line kit with push-in fittings, 2 x chrome inflation valves, a T-piece fitting and all mounting hardware plus instructions. An air compressor and pressure gauge are not included and are sold separately. Everything needed to bolt the air springs into your existing coil springs is in the box.
Yes, this is one of its main jobs — the adjustable air spring reduces rear sag when you're towing a caravan or trailer with tow ball weight loaded onto the JK's rear coils. Increasing air pressure firms up the rear to keep the vehicle level, which helps headlight aim and brake balance. It's a common addition for JK owners who tow regularly but don't want a permanent spring rate change.
Not for this helper kit specifically, since it doesn't change your ride height or suspension geometry. If you're also fitting a lift kit alongside this helper kit, upgraded control arms are worth considering to correct pinion and caster angles at the new height. For the helper kit alone, your factory control arms remain suitable.
No, wheel alignment isn't mandatory for this kit alone because it doesn't alter ride height or suspension angles when deflated. It's still good practice to have your alignment checked as part of regular servicing, especially if other suspension work has been done recently. If you combine this kit with a lift kit, alignment afterward is required.
This kit doesn't involve a spring rate choice — it works with whatever coil spring is already fitted to your JK, as long as it has a 120mm internal diameter. The air spring pressure is what you adjust, not a fixed spring rate, giving you a variable range of support rather than one fixed rating. If you need a heavier constant-load spring rate instead, browse our coil spring range for raised or heavy-duty options.
This helper kit doesn't change your ride height, so it won't create clearance for larger tyres on its own. If you're planning bigger rubber, you'll need an actual lift kit for the added clearance, which you can browse in our lift kit range. This kit is purely for load support at your current ride height.
The air springs are covered by Firestone's lifetime manufacturer warranty, as Airbag Man kits use genuine Firestone air spring components. This covers manufacturing defects in the rubber air spring for the life of the product. 4WD Suspension Australia also provides fitment support if you have questions during or after installation.
Yes, the helper kit is designed to run deflated for unladen daily driving, so your JK rides on its factory coil spring alone with no change to comfort. When you load up for touring or towing, you simply air up the springs for extra support, then deflate again for the commute home. It's a flexible setup rather than a fixed daily-drive compromise.
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