SRO America Confirms Bigger 2026 Grids as GTWC America Adopts Single Three-Hour Races

Overview

• GT World Challenge America’s provisional list features 21 full‑season GT3 entries, the most since 2019, with nine manufacturers and Porsche leading with eight 911 GT3 Rs.
• Six cars are entered in the Pro class under the rule requiring at least one FIA Silver driver, while Pro‑Am remains the majority of the field.
• Turner Motorsport graduates to Pro with Robby Foley and Justin Rothberg in a BMW M4 GT3 EVO as JMF Motorsports returns with its title‑contending Mercedes‑AMG and expands to a second Pro‑Am car for Jason Daskalos and Lorcan Hanafin.
• Several long‑running teams will not contest SRO America in 2026, including DXDT Racing, Regulator Racing and Heart of Racing, with the format change cited among the reasons.
• Pirelli GT4 America lists 28 full‑season entries and is expected to exceed 30, highlighted by a series‑high ten BMW M4 GT4 EVOs and multiple Ford Mustang GT4 programs, ahead of the Sonoma opener later this month.