You won't find a whole lot of high performance tire exceeding 20k miles, especially with a rwd sports car. 18k is about right for the bridgestones. Its always a compromise between grip/handling and thread life. Softer rubber will wear off a lot quicker than commonly used on all seasons. Go with all seasons if you care more about thread life than performance. You can't have both.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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