IndyCar issue bulletin for Fontana

Via INDYCAR bulletin to teams, no rear wicker or U'wing strakes may be used in the 250-lap race at Auto Club Speedway on Sept. 15. Other aerodynamic specs for the season finale include the mandatory use of the Indianapolis Motor Speedway rear-wheel guards, the Speedway rear-wing mainplane and the Speedway rear-wing mainplane endcaps. Optional are U'wing sidewalls, rear-wheel infils, sidepod top deck and radiator inset shutters.

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