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2025 TECHNICAL BULLETINS

IMSA WEATHERTECH CHAMPIONSHIP

Technical Bulletin IWSC #25-01: 08/19/24 2025 Technical Regulations Release: GTD-PRO, GTD

IMSA MICHELIN PILOT CHALLENGE

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IMSA VP RACING SPORTSCAR CHALLENGE

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PORSCHE CARRERA CUP

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MAZDA MX-5 CUP

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MUSTANG CHALLENGE

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2024 Technical Bulletins

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