2011 Dial Before You Dig Australian Manufacturers' Championship 500

The 2011 Dial Before You Dig Australian Manufacturers' Championship 500 was an endurance motor race for production cars. It was held on 10 and 11 September 2011, at Sandown Raceway in Melbourne, Victoria, Australia. It was Round 4 of the 2011 Australian Manufacturers' Championship, Round 4 of the 2011 Australian Production Car Championship and Round 2 of the 2011 Australian Production Car Endurance Championship. The race was won by Stuart Kostera and Ian Tulloch, driving a Mitsubishi Lancer Evolution X. The Lancer Evolution 9 of Tony Quinn and Klark Quinn finished in second place with another Lancer Evolution 9 in third, driven by Jim Pollicina and Dean Kelland.

The race was run over two days and had two legs, each one scheduled to be eighty laps and 250km in length. However, due to stoppages and delays on each day while other categories were running, the Saturday leg was shortened to 73 laps and the Sunday leg to 60 laps. The first leg was won by John Bowe and Peter O'Donnell in a BMW 335i while Kostera and Tulloch won the second leg and the race overall.