USAC TECHNICAL BULLETINS

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.