2025 COMPETITION BULLETINS
IMSA WEATHERTECH CHAMPIONSHIP
Comp Bulletin IWSC #25-02: 12/11/24 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-03: 01/08/25 ROAR and Rolex 24 Event Driver Helmet and FHR Inspections
Comp Bulletin IWSC #25-04: 01/15/25 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-05: 01/17/25 DIS Yellow Garage Fire Lanes
Comp Bulletin IWSC #25-06: 1/19/25 ROAR Before the 24 Session #7 Bronze Driver Participation
Comp Bulletin IWSC #25-07: 1/21/25 Rolex 24H Full Field Photo Process
Comp Bulletin IWSC #25-08: 1/22/25 GTP Rolex 24 At Daytona Tire Usage Notes
Comp Bulletin IWSC #25-09: 1/23/25 Rolex 24 At Daytona GTP Technical Inspection
Comp Bulletin IWSC #25-10: 2/27/25 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-11: 4/2/25 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-12: 4/30/25 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-13: 7/30/25 IMSA WeatherTech Championship 2026 IMEC Logo Update
Comp Bulletin IWSC #25-14: 9/10/25 IMSA WeatherTech Championship Sporting Regulations Updates
Comp Bulletin IWSC #25-15: 11/5/25 IMSA WeatherTech Championship GTP Private Testing Tire Usage
IMSA MICHELIN PILOT CHALLENGE
Comp Bulletin IMPC #25-02: 12/11/24 IMSA Michelin Challenge Sporting Regulations Updates
Comp Bulletin IMPC #25-03: 01/08/25 ROAR and Rolex 24 Event Driver Helmet and FHR Inspections
Comp Bulletin IMPC #25-04: 01/15/25 IMSA Michelin Challenge Sporting Regulations Updates
Comp Bulletin IMPC #25-05: 02/27/25 IMSA Michelin Challenge Sporting Regulations Updates
Comp Bulletin IMPC #25-06: 4/30/25 IMSA Michelin Challenge Sporting Regulations Updates
Comp Bulletin IMPC #25-07: 9/10/25 IMSA Michelin Challenge Sporting Regulations Updates
IMSA VP RACING SPORTSCAR CHALLENGE
Comp Bulletin VPRC #25-02: 12/11/24 IMSA VP Racing SportsCar Challenge Sporting Regulations Updates
Comp Bulletin VPRC #25-03: 1/15/25 IMSA VP Racing SportsCar Challenge Sporting Regulations Updates
Comp Bulletin VPRC #25-04: 2/19/25 IMSA VP Racing SportsCar Challenge Sporting Regulations Updates
Comp Bulletin VPRC #25-05: 7/2/25 IMSA VP Racing SportsCar Challenge Sporting Regulations Updates
Comp Bulletin VPRC #25-06: 8/6/25 VPRC CTMP Race #2 - Rescheduled to the VIR Event
Comp Bulletin VPRC #25-07: 8/18/25 VPRC CTMP Race #2 - Rescheduled to the VIR Event Revised
Comp Bulletin VPRC #25-08: 9/10/25 IMSA VP Racing SportsCar Challenge Sporting Regulations Updates
PORSCHE CARRERA CUP
LAMBORGHINI SUPER TROFEO
MAZDA MX-5 Cup
Comp Bulletin MX5 #25-02: 2/28/25 Mazda MX-5 Cup Presented By Michelin St. Pete Maximum Lap Times
Comp Bulletin MX5 #25-03: 2/28/25 Mazda MX-5 Cup Presented By Michelin St. Pete T&S Loop Location
Comp Bulletin MX5 #25-04: 5/2/25 Mazda MX-5 Cup Presented By Michelin Barber Maximum Lap Times
Comp Bulletin MX5 #25-05: 8/27/25 Mazda MX-5 Cup Presented By Michelin - MRRA Third-Party Track Days
Comp Bulletin MX5 #25-06: 9/10/25 Mazda MX-5 Cup Sporting Regulations Updates
MUSTANG CHALLENGE
Comp Bulletin MC #25-01: 1/15/25 2025 Mustang Challenge Sporting Regulations Publication
Comp Bulletin MC #25-02: 2/27/25 Mustang Challenge Sporting Regulations Updates
Comp Bulletin MC #25-03: 7/17/25 Mustang Challenge Sporting Regulations Updates
Comp Bulletin MC #25-04: 9/4/25 Mustang Challenge CotA Car Circulation Update
Comp Bulletin MC #25-05: 9/10/25 Mustang Challenge Sporting Regulations Updates