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Topic: USAC SouthWest Sprint Muffler Rule - Arizona & Central Arizona Speedways
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March 14, 2017 at
08:59:57 PM
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Joined:
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11/22/2004
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27816
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Reminder for this Saturday: USAC SouthWest Sprint Cars, the Schoenfeld 14272735-78 will be required at both Arizona Speedway and Central Arizona Speedway for the 2017 season. These mufflers are mandatory.
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