Andreas Bakkerud, competing on a limited schedule of events for the Subaru team, qualified fourth overall but was forced to drive through a flat tire in the final, finishing seventh.
All three Subaru cars were fast in practice, winning each of the three open practice groups on Friday.
Nitro Rallycross mastermind Travis Pastrana took second, his first-ever podium in the series he helped create.
The ninth Launch Control season extensively documents the inaugural Nitro Rallycross season.
Speed is now tied for the championship lead with Timmy Hansen, with Pastrana in fourth behind Kevin Hansen with three rounds to go.
The thrilling final race briefly saw the three blue and gold Subaru WRX STI’s sitting first, second and third—although a puncture would eventually relegate Bakkerud to seventh.
The ERX track in Elk River, Minnesota features an all-dirt layout with huge rolling jumps, highly banked corners and wide corners for plenty of passing opportunities.
The victory caps a two-year comeback story for Speed, who broke his back in the 2019 Nitro RX event and worked his way back into competition shape through 2020.
Driver Scott Speed took the overall win with a flawless drive in the final to cap off a fast, tactical weekend of racing.
The 1-2 finish is Subaru’s best-ever result in Nitro Rallycross as the series expands from one-off events in 2018 and 2019 into a full five-round series for 2021.
Bakkerud made the best move of the heats, diving down the inside of Turn 1 to move up from sixth on the starting grid to second behind his teammate and sending all three Subarus through to the front two rows of the final.
Heat seeding after the Saturday qualifying rounds meant Speed and Bakkerud were placed in the same heat on Sunday morning, after Pastrana won his heat to punch his ticket to the final.
