In 2004, the facility received a A$3 million upgrade which included some modifications to the layout of the track, including moving the start/finish line back to a more conventional location opposite the pits. It had previously been on a curve (which is now located just after the first corner), unusual for a road course. Symmons Plains is also known for its extremely tight hairpin bend, known as Brambles Hairpin, at the end of the old front straight.
Symmons Plains Raceway is 2.41 kilometres (1.50 mi) long and is very hard on brakes. The banking at the hairpin is a unique opportunity to overtake. The other overtaking opportunity is the left hander at the end of the back straight.