The Trading Post Perth Challenge was the fourth event of the 2011 International V8 Supercars Championship.

It was the 34th time a motor racing event held at Barbagallo Raceway had contributed to the Australian Touring Car Championship and its successors.

It was held on the weekend of April 29 to May 1 at Barbagallo Raceway, near Wanneroo, just outside Perth, Western Australia.

[1] The meeting was overshadowed by a heavy collision at the start of Race 8 which saw Steve Owen collide with the stalled Holden Commodore of Karl Reindler.

The impact ruptured the fuel tank at the rear of Reindler's Brad Jones Racing Commodore, causing the car to erupt into a fireball.