Mazda will head into next month’s IMSA WeatherTech SportsCar Championship round at Detroit with some added weight in its prototype, following the latest round of Balance of Performance adjustments.

IMSA has handed the Lola-based prototype a 15kg increase in minimum weight, effective for the Belle Isle event. It brings the car’s total weight up to 905kg.

It compares to the 950kg minimum weight for the Ligier JS P2 Honda, the only other P2 car competing full-time in the series this year.

The change comes in the wake of Mazda’s runaway performance in the Continental Monterey Grand Prix at Mazda Raceway Laguna Seca, which saw the pair of SpeedSource-run entries top the time charts in every practice session and sweep the front row in qualifying.

However, a series of mistakes and a mechanical issue prevented the team from finishing on the podium with either car.

No other BoP changes have been made to cars in the Prototype, GT Le Mans or GT Daytona categories.