GVM Upgrades in Sydney
Three specialist GVM brands, each matched to a different kind of vehicle – supplied, fitted and certified in-house at our Smeaton Grange workshop.
Every kit is engineered and approved
By our own technicians, not sub-contracted
Plates, certification and rego updates
Dobinsons, JMACX & Offroad Industries
Three brands. Three different jobs.
There's some overlap between the brands on a few vehicles, but every kit is engineered for a different application. Start with the brand that fits your vehicle and how you use it – or skip to your vehicle below and we'll show you what's available.
How they compare
| Dobinsons | JMACX | Offroad Industries | |
|---|---|---|---|
| Built for | Popular utes, wagons & 70 Series | LandCruiser, INEOS & Tundra heavy touring | American trucks |
| Licence | Car (NB1) | Car (NB1) | Car (NB1) or light rigid (NB2), depending on package |
| Suspension | Leaf & coil spring kits | Coil conversions, leaf GVM, Super Chassis | FOX & BDS staged packages |
| Shocks | Twin Tube, IMS or MRR | Alpha 2.5 electronic | FOX |
| Towing (GCM) | Factory GCM retained | Confirmed per package | GVM & GCM re-rates available |
| Pricing | From $3,530 inc GST* | Quoted to your build | Quoted to your build |
*Further charges for state based engineering may apply. GVM ratings depend on the vehicle and package – see each vehicle below. Ratings vary by model, variant and build date – we confirm the right package at quote.
Find your vehicle
Tap a brand on your vehicle to see its kits, specs and pricing.
LandCruiser, Prado & INEOS
Where two brands are listed, each kit suits a different load, budget and build style.
Utes
Dobinsons federally approved kits with published, supplied & fitted pricing.
American trucks
Offroad Industries packages including NB2 options, plus JMACX for the Tundra.
See our GVM builds
Real builds from our Smeaton Grange workshop.
JMACX 4495 – the ultimate 79 Series GVM upgrade
79 Series dual cab build rundown – Boss Aluminium & JMACX GVM
Project 78 – the ultimate two-person overlander
Why a GVM upgrade?
Most touring vehicles leave the factory with far less payload than people expect. Add a tray or canopy, drawers, a fridge, water, fuel, a rooftop tent and passengers, and many 4x4s are over their legal Gross Vehicle Mass before they leave the driveway. Driving overweight can void insurance, and it puts extra load on brakes, suspension and chassis.
A GVM upgrade legally increases the maximum loaded mass of your vehicle. It combines engineered suspension components – springs, shocks and sometimes axle or chassis work – with the approval and paperwork that updates your vehicle's compliance.
- GVM – the maximum your vehicle may weigh fully loaded.
- Payload – GVM minus kerb weight: what you can actually carry.
- GCM – the maximum combined mass of vehicle plus trailer or caravan.
NB1 or NB2? Pre-rego or post-rego?
The decisions that shape every GVM upgrade.
Why Project Overlander
Fitted in-house
Every GVM upgrade is fitted by our own technicians at our Smeaton Grange workshop – not sub-contracted.
The right brand, not one brand
Because we fit Dobinsons, JMACX and ORI, we recommend the kit that suits your vehicle and load, not the only one we sell.
Build it once
Combine your GVM upgrade with trays, canopies, drawers, long range tanks and 12V, planned around your new payload.
GVM upgrade FAQs
Which GVM brand is right for me?
It depends on your vehicle and how you use it. Dobinsons suits popular utes and wagons with an affordable, published-price kit. JMACX suits heavy-touring LandCruiser, INEOS and Tundra builds that need coil conversions or higher ratings. Offroad Industries suits American trucks, including NB2 packages. Send us your vehicle and load and we will recommend one.
Why do some vehicles have two brands?
On a few vehicles – like the 79 Series, Troopy, 300 Series, F-150 and Tundra – more than one brand has an approved kit. They are built for different jobs: one may keep factory wheels and cost less, the other may carry more or add a coil conversion.
What is a GVM upgrade?
An engineered upgrade that legally increases the maximum loaded mass of your vehicle, using approved suspension components and updated compliance so you can carry more weight safely and legally.
Will I need a truck licence?
Only if the upgrade takes the vehicle above 4,500 kg GVM (NB2), which needs a Light Rigid licence. Upgrades at or below 4,495 kg keep the vehicle on a standard car licence.
Is pre-rego or post-rego better?
Pre-registration upgrades are usually simpler and cheaper, so they are ideal when buying new. Post-registration upgrades work for vehicles already on the road but involve extra state engineering and registration fees.
Will a GVM upgrade reduce my towing capacity?
It depends on the package. Dobinsons kits keep the factory GCM; some JMACX and ORI packages keep or re-rate GCM. We confirm the numbers for your exact vehicle before you book.
Book a GVM consult
Tell us your vehicle and what you carry and tow. We'll recommend the right brand and package and send you a quote.