Welcome to Jmacx

Australia’s leading suspension specialists for the Toyota Landcruiser and innovators of the bolt in coil conversion , we have you covered from leaf to coil suspension with the highest axle load rating in Australia , GVM upgrades from 3900kg to 6000kg and legal lift of up to 4 inches and 35 inch tyres , have a look through our website to find a product that best suits you.

LC70 Series 4200 GVM Coil Conversion

The Jmacx 4200 GVM bolt in coil conversion is the world’s number one trusted bolt in coil conversion on the market and is the industry leader here’s why, with hundreds of conversions done and millions of combined kms driven in some of the world’s harshest condition this kit is fully engineered to go above and beyond. Also giving you a GVM upgrade of 4200 this is the ultimate suspension upgrade for outback tourers, commercial vehicles and the weekend warrior. Tested and proven in some off the world’s harshest conditions.

  • all Jmacx bolt in coil conversion can be done *PRE AND POST REGO* in all states
  • all Jmacx bolt in coil conversion can have up to 4inch of lift and 35inch tyres
  • with this Jmacx bolt in coil conversion you get a:
  • Increase GVM to 4200kg
  • Maintain BTC of 3500kg at full 4200 GVM
  • Axle load increase to 2700kg                                                                           
  • SSM Number:48554 (visit rvcs website to confirm Specs)
  • (for more information on axle loads,BTC and GVM please read our article here CALCULATE YOUR WEIGHT)
All Jmacx products have full engineering to ensure you are safe and legal on Australian roads. To see what comes in your Jmacx bolt in coil conversion please watch the video and then use the kit builder bellow to get a quote today .

Frequently Asked Questions

 Does the Kit Contain Parts that are Custom and Maybe Difficult to find if in the middle of Nowhere?

  • Our diffs maintain all factory brakes, hubs, bearings, seals, diff lockers etc.
  • Our Coil Kit uses factory length Landcruiser control arms, Panhard.
  • Most parts maintain OEM Toyota bushes, so parts can be easily accessible anywhere in the world.

What if I Break an Axle?

  • Our diff housings are full fabricated units that exceed the strength of the factory original unit. JMACX Axles are the strongest production manufactured axle for Toyota Landcruiser available.

How Long will Jmacx need my vehicle for?

  • The Conversion will take around 7 working days depending on what accessories are being fitted to the vehicle.

 Does the new wide track diff correct the rear vehicle track?

  • Yes

Can i have a Custom Colour?

Yes, automatically our kits are a standard black.

But let us know and we can give you a custom colour to suit you!

We often see customers selecting a colour that represents their business 

Will It Affect my Insurance?

No, but it is up to each individual to check with their insurer. (Generally Insures only require the vehicle to be Legal.) 




LC70 Series 4200 GVM Leaf Spring

Jmacx now has a gvm option for the leaf sprung vehicles that ticks all the boxes. track correction, correct high axle load capacity, improved braking, vehicle stability .All though the leaf spring kits can’t compare to the ride comfort of a coil conversion they are a great option for those who want to stay with the leaf springs and need a true GVM upgrade. Here are some key points as to what you can get from a Jmacx 4200gvm leaf kit.

The biggest advantage to the Jmacx 4200 leaf kit is the high rear axle load capacity of 2700kg this combined with the GVM upgrade allows your landcruiser to be loaded practically in the rear to its full potential.   

All Jmacx products have full engineering to ensure you are safe and legal on Australian roads. To see what comes in your Jmacx 4200 leaf kit use the kit builder bellow to get a quote today.

LC200 Series 4200 GVM

Looking for a GVM upgrade on your LC200 series? We have you covered with the 4200GVM kit from Australian Expedition Vehicles this kit can be done *PRE and POST REGO* in all states with 2inch’s of lift. Your vehicle will only be able to have a maximum seating capacity of 5. To check the specs on this kit please visit rcvs website.