What people are saying here is right. We recently looked into a GVM upgrade for a customer on another make vehicle and the best way to do it is pre-registration. The dealer sends the vehicle to an authorised GVM upgrade installer, who installs the modifications and a compliance plate, and it is returned to the dealer for registration. Each GVM upgrade must be applied for by the installer to the supplier of parts, and only certain brands/kits are approved. We had to submit quite a lot of paperwork to get approval to do this using Ironman product, and kits are available for a limited selection of vehicles.
Suspension is one of the modifications required, the next limiting factor is usually axle rating, so a suspension only upgrade will only get you 200-300kg of extra GVM.
It can be done post registration, but requires engineering and is a little more complex.
Last edited by adrenalinoffroad; 08-04-2016 at 11:58 AM.
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