Red Bull-Backed Team Finds Undersized Restrictor on Will Brown’s Supercar

Red Bull-backed Triple Eight Race Engineering has revealed that defending Supercars champion Will Brown ran the entire 2026 season with an undersized engine airflow restrictor on his Ford Mustang, a discovery that finally explains the team's puzzling pace deficit. Team principal Jamie Whincup confirmed the supplied part was one millimetre smaller than the regulated Ford specification and had been costing the car roughly one-and-a-half tenths a lap since February.

Why it matters:

The finding solves the mystery behind Brown's sharp drop-off after his 2024 title-winning campaign, as he sits seventh in the standings heading into the season finale. It also raises serious questions about how a controlled, championship-supplied component remained undetected for half the season, and whether the lost points have already ended his championship defence.

The details:

• The restrictor was loaned to Triple Eight by Supercars solely for display at the team's February launch, but was inadvertently left on Car #888 and never swapped for the correct race part.
• Whincup stated the undersized part choked engine airflow and produced a "significant negative impact" on lap times, estimating the deficit at around 0.15 seconds per lap.
• Supercars confirmed that routine pre-Perth scrutineering did not include a specific check of the restrictor on Brown's car, allowing the error to persist through the Perth Super 440.
• The team is rolling out a new spare chassis for Brown at this weekend's Queensland Raceway round on 21–23 August, aiming to measure true performance with equal horsepower.

What's next:

Triple Eight intends to challenge Supercars on why a controlled component left the supply chain out of specification, while the championship has pledged to review its technical procedures. With the restrictor corrected and a fresh chassis beneath him, Brown will finally get a clear picture of whether his early-season struggles were purely hardware-related.