The McLaren 570S GT4 has been hit with more Balance of Performance adjustments ahead of this weekend’s IMSA Michelin Pilot Challenge round at Road America.
Confirmed by IMSA in the latest BoP table, a further 20 kg has been added to the mid-engined sports car, as well as adjustments in ride height (-5 mm front, -15 mm rear).
It is the third BoP adjustment to the McLaren in the last four races after an initial 40 kg increase ahead of the four-hour Watkins Glen race in June followed by an additional 10 kg added prior to the race at the same track the following week.
The McLaren is now 70 kg heavier than the configuration it ran at Mid-Ohio in May.
Among other BoP changes in the GS class for this weekend include a 2 mm increase in air restrictor for the Chevrolet Camaro GT4.R and a 1 mm larger opening for the Audi R8 LMS GT4.
Fuel capacities have been adjusted for several cars as well, in addition to an updated ECU calibration for the Ford Mustang GT4 and change in engine map for the Mercedes-AMG GT4.
No adjustments have been made to the TCR class for the Road America 120.