Starc appears to be in a two-way battle with Jackson Bird to fill the final position in the pace attack, and the 22-year-old believes his point of difference with the left-arm can help Australia in the must-win third Test.
Both quicks took two wickets each against Sussex, and neither really demanded to be picked.
Bird bowled better out of the blocks with the new ball, but Starc fought back and was superior on the final day.
Starc admits it took him a while to control the swinging Dukes ball at Hove, but believes he has the necessary X-factor to earn a recall for Manchester.
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"I've got that point of difference with the left-arm. You've just got to do what you can to take wickets and perform in the game and let the selections take care of themselves," he said.
"We were actually surprised with how much it did swing here for Birdy and myself, and even for James Faulkner.
"It definitely swung more here than the last few times we've had the Dukes. It was a little bit tougher to control but once you get a few overs of that under your belts and adjust your lines, you should be hitting that target."
Starc said it was a positive to have got the ball swinging for the full 100 overs of the Sussex innings, however, the Australian bowlers would have been disappointed they couldn't knock their county opponents over.
Over the past eight months, Starc has been left out of marquee Tests at the MCG on Boxing Day and an Ashes Test at Lord's.
But he says he holds no bitterness and motivated by the belief the ball has been coming out nicely for him all tour.
"You never want to miss a game at all. It's always a little bit disappointing to miss out on any game of cricket but it was my turn to miss out I guess," he said.
"I just have to do everything I can to get myself ready."