Overview

• The increase from 670 to 750 horsepower will apply at all road courses and ovals under 1.5 miles, covering 21 of 38 Cup race weekends in 2026.
• Impacted events include both exhibitions—the Clash at Bowman Gray Stadium and the All‑Star at Dover—along with tracks such as Martinsville, Bristol, Phoenix, COTA, Sonoma, Watkins Glen, Richmond, New Hampshire, Nashville and Gateway.
• NASCAR will run an offseason test at North Wilkesboro with teams and Goodyear to refine tire selections and check the aerodynamic and tire effects of the higher power.
• Five of the first eight races next season will use the new configuration to provide an early read on engine health and the on‑track product.
• Leaders say the move follows fan and industry input, with 750 hp chosen because going higher could add $40–50 million in costs and threaten durability under current multi‑race engine rules; possible expansion to intermediate tracks remains under evaluation.