USAC TECHNICAL BULLETINS
AUGUST 16, 2023
TIRE BULLETIN: USAC AMSOIL SPRINT CAR NATIONAL CHAMPIONSHIP
Through the End of the 2023 Season: Both new & old Hoosier medium right rear tires are permitted.
Through the End of the 2023 Season: Any Hoosier left rear tire is permitted (including SC12, RD Series & D Series).
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AUGUST 15, 2023
IGNITION BOX FOR MIDGETS
Update to Appendix D, Section 416.C – Ignition & Electronic Equipment
The Performance Electronics PE3 IG and IG2 ignition box is now permitted in USAC NOS Energy Drink Midget National Championship competition.
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JUNE 21, 2023
TIRE BULLETIN: USAC AMSOIL SPRINT CAR NATIONAL CHAMPIONSHIP
Through July 31: Both new & old Hoosier Medium right rear tires are permitted.
Through July 31: Any Hoosier left rear tire is permitted.
Starting August 1: Only new Hoosier Medium right rear tires are permitted.
Starting August 1: Only Hoosier SC12 left rear tire is permitted.
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MAY 8, 2023
TIRE BULLETIN: USAC AMSOIL SPRINT CAR NATIONAL CHAMPIONSHIP
Through June 30: Both new & old Hoosier Medium right rear tires are permitted.
Through June 30: Any Hoosier left rear tire is permitted.
Starting July 1: Only new Hoosier Medium right rear tires are permitted.
Starting July 1: Only Hoosier SC12 left rear tire is permitted.
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MARCH 24, 2023
TITANIUM SUSPENSION PARTS
An amendment has been made to all three USAC National series:
Under Section 207, 307, and 407, titanium suspension parts to include torsion stops and torsion arms are permitted.
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MARCH 17, 2023
USAC SPRINT CAR TIRES
Through May 15: Both new and old Hoosier Medium Right Rear tires are permitted.
After May 15: Only new Hoosier Medium Right Rear tires are permitted.
Through June 30: Any Hoosier Left Rear tire is permitted.
Starting July 1: Only Hoosier SC12 Left Rear tire is permitted.
