The two manufacturers submitted new lighter panels to Supercars earlier this week for approval with homologation teams Tickford Racing requesting bonnet and roof changes, while Nissan Motorsport applied for a composite roof.
Nissan Motorsport is running new roofs on all four Altimas while it has been reported by the category that two bonnets and two roofs are being used across cars for Tickford Racing and Shell V-Power Racing.
“The process for a team to change a panel or part is to be approved by the Sporting and Technical Director,” read a statement from Supercars.
“The homologation team for that manufacturer's model must formally request the change, after which it will be assessed in line with the rules and regulations of the sport, ensuring there is no compromise in safety or competition parity.
“Once approved the teams using that manufacturer's model can implement the change for competition.”
Supercars approved the use of the panels shortly before the start of opening practice at Albert Park.