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Underbody Protection Kit

The Groundswell Offroad Underbody Protection Kit is built to defend where it matters most: your 4WD’s undercarriage. Designed for serious offroaders, it delivers both deep cleaning power and long-lasting protection to keep your chassis clean, corrosion-free and ready for the next adventure across beach tracks, muddy trails or outback terrain.

Introducing the all-new Underbody Jet Pro

At the heart of the kit is our new Underbody Jet Pro, 12 months in the designing and machining. It’s CNC machined on the Sunshine Coast from 25mm x 25mm solid aluminium square bar and rolls on Australian-made wheels. Twin jets sit on the bar, fed by our own Y-pipe design at the rear, so you get even, powerful water flow straight up into the chassis rails, wheel arches and every hidden corner where salt, sand and mud like to hide.

EMPTY DOM REMOVE PROTECTOR
Regular price $319.00
Shipping calculated at checkout.
  • Chassis Protection
  • Deep Cleaning
  • Rust and Corrosion Shield
  • Australian Made
EMPTY DOM REMOVE PROTECTOR
Pressure Washer Adapter Please Select
EMPTY DOM REMOVE PROTECTOR

Product Details

The Groundswell Offroad Underbody Protection Kit cleans and protects your 4WD’s underbody so it’s ready for the next beach track, muddy trail or outback run.

Start with the all-new Underbody Jet Pro, CNC machined on the Sunshine Coast from solid aluminum. Our rear Y-pipe design feeds twin high-pressure jets that flush salt, sand and mud from deep inside the chassis. It comes with 12 interchangeable jet nozzles and doubles as a short gun.

Finish with Underbody Protection Spray, a professional-grade formula that leaves a durable anti-corrosion barrier.

  • Flushes salt, sand and caked-on mud
  • 12 interchangeable jet nozzles
  • Repels water, salt and grime
  • Up to 2 weeks of protection daily on the beach or 6 months on the road.

Included Items

1x Underbody Jet Pro

2 x Turbo nozzles

10 x Interchangeable jets

1x Underbody Protection Spray (1L)

1 x Pressure Washer Adapter

How To Use

How to use

Step 1: Connect the Underbody Jet Pro to your pressure washer and position it beneath your vehicle’s chassis.

Step 2: Turn on the pressure washer and roll the Underbody Jet Pro slowly along the chassis rails and undercarriage to flush out salt, mud and debris.

Step 3: Once the underbody is clean and dry, apply the Underbody Protection Spray evenly across all exposed metal surfaces.

Step 4: Allow the coating to cure for 2 hrs before driving for full protection.

TIP: Use after every beach or offroad trip to maintain long-term underbody protection.

Specifications

  • High-pressure Underbody Jet Pro with 12 interchangeable jet nozzles
  • Connects directly to your pressure washer
  • Suitable for 4WDs, trailers and caravans
  • Anti-corrosion protection lasting up to 2 weeks on the beach daily or up to 6 months on road.
  • CNC machined on the Sunshine Coast and tested for harsh offroad environments
The log bridge on the Old Telegraph Track (OTT) in Cape York is an iconic, precarious, and often nerve-wracking river crossing located at Cypress Creek. It consists of narrow logs, often reinforced with ratchet straps, spanning a significant drop. It is known for being shaky and requiring careful spotting to navigate safely.

The Only Offroad Cleaning System Tested on K'gari, Double Island & Cape York's Harshest Conditions

Customer Reviews

Customer Reviews

Overall rating: 4.9 / 5 from 99 reviews.

Customer video review of The Jett Chassis Flusher Kit

Amazing result. Really easy to thread through chassis. Flushed out an astonishing amount of mud and grit

The Jett Chassis Flusher Kit

Customer photo review of Triple Protection Bundle 5lt

I picked up Groundswell’s Triple Protection Bundle and I’m seriously impressed. I’ve used the Offroad Wash and Underbody Spray before and absolutely love them — after my last trip to Teewah Beach there was barely any sand left on the car! I’m heading to Fraser next, and after trying out the new Offroad Protective Sealer, I feel like my car is properly sorted and ready to go. Honestly, couldn’t recommend these products enough. Groundswell, you guys are killing it!

Triple Protection Bundle 5lt

I don't generally leave reviews for a lot of products, however this red dirt wash has genuinely worked wonders for me, I had a mixture of red dirt dust and mud that had stuck to everything after a big trip and was struggling to remove the excess on my sills and underbody. I just added the recommended amount into a pressurized spray bottle and let it sit on the affected areas for a few minutes and it took off a massive amount with no agitation. I've used multiple other snow foams etc prior with no luck. It didn't remove everything entirely however next time I go to clean it I will agitate the rest and no doubt it will all be gone. This mud has now ingrained itself after a 8/9 months and wasn't fresh. Overall im extremely impressed. Thanks guys.

Mud Red Dirt Wash - Outback & Bush Wash

Always good to deal with this company great value, fast shipping and good back up service.

The Jett Chassis Flusher Kit

great product I will be back for more

Offroad Kits

Really happy works perfectly. I tried other brands they couldnt compete with the groundswell product results.

Premium Wash - Beach & Salt Wash

I liked this product got rid of clay that had been on the ute for few weeks seemed to dissolved it with some hard scrubing

Mud Red Dirt Wash - Outback & Bush Wash

A much better way to spray the underside of your vehicle than the trigger operated sprayers. Also great that it’s solvent resistant.

Solvent Pump Sprayer 1lt

The pump up pressure sprayer is much easier to apply an even coating than the trigger type sprayer.

Underbody Protection Pro Kits

Lee was very helpful getting these great products to me he also took the time to explain how to best apply them

Underbody Protection Spray

It’s great extremely happy with it

Snow Foam Cannon

Tyres Looking good.

Tyre Shine

Very happy with the service and works great cleaning my side x side

The Jett Chassis Flusher

Excellent service provide by these guys. Snow Foam Cannon arrived just before Xmas but was damaged during transit to WA. Emailed them and a replacement was sent within a week during the busy Xmas/New Year period. New gun works brilliantly.

Snow Foam Cannon

Works well but I wouldn't say it works any better than some of my other products that weren't designed to get rid of red dirt.

Mud Red Dirt Wash

Get product, amazing service, very effective coating. Keep up the great work.

Underbody Protection Spray

Every part as good as Bowdens Happy Ending and much cheaper

Hydro Protection Foam

Haven't used it yet. Quick delivery and good value if works as claimed.

Underbody Protection Spray

My second because I have two houses and keep the washing gear at both

Snow Foam Cannon

Works really well came back from Moreton Island and it flushed out that much sand I was amazed

The Jett Chassis Flusher

Works too well. The amount of sand that came out of the chassis was amazing. Cant wait to go beach driving again just to use it.

The Jett Chassis Flusher