Mostert goes fastest in opening Perth practice session

Walkinshaw Andretti United's Chaz Mostert has set the fastest time in the only Friday practice session for the Perth Supersprint.

In a session sandwiched by red flags, Mostert came out on top with a time of 0:55.093 enough to put the Mobil1 Optus Mustang to the top of the timesheets.

Drivers only got a few laps under their belts before Thomas Randle came to a grinding halt in Turn 1, bringing out a brief red flag. Randle would eventually rejoin the session after a tailshaft replacement but lost valuable track time.

The #4 car of Cameron Hill would have an unfortunate meeting with the concrete and would bring out the second red flag. This would bring his, and the rest of the Supercars grid, practice to an early ending.

It wasn't just Supercars having all the fun however, with every support category seeing plenty of track time

A solid lineup of supporting acts joins the action this weekend, giving fans plenty of entertainment across the weekend. The Radical Cup makes another appearance at Carco.com.au raceway, throwing some sportscar racing into the mix. With a 23 car grid, these open cockpit rockets will be exciting.

Both the Aussie Racing Cars and Touring Car Masters make a welcome and long awaited return to the west, boasting 23 and 16 cars respectively. A few mechanical failures have already plagued the Aussie Racing Car ranks on Friday, with the 21 car of Shane Mann coming to a stop at the exit of Turn 6 during first practice.

The sound of old school v8s turned the heads of the crowd as the Touring Car masters rolled for first practice, the category seeing the Wanneroo circuit for the first time in 11 years

Touring Car Masters will open the action at Carco.com.au Raceway, with their Trophy Race at 8:35 local time