Stopping the Porsche repeatedly throughout an endurance race requires serious braking potential. The Porsche 911 GT3 Cup uses Brembo six piston calipers in the front with 380 mm vented steel brake discs, with four piston calipers and 355 mm in the rear. Magnus Racing uses Pagid brake pads on their Porsche. Such are the braking demands in the 24 Hours of Daytona that the team will perform a full pad change by the race’s 16th hour. Due to the monoblock construction of the front brakes, however, it is quicker for the team to simply swap the front calipers utilizing a quick disconnect fitting on the brake line.
Three-piece aluminum BBS wheels, sized 9.5 x 18 in the front and 12×18 in the rear, are used on the Porsche. In GRAND-AM, the regulations require that the centerlock wheels must be converted to five-lug. Continental Racing tires, sized 275/40-18 in the front and 315/35-18, are used in GRAND-AM.
Some changes from the GT3 RS bodywork are made, especially in the rear fenders, to accommodate the large rear tires. The car’s interior features a welded in roll cage that meets IMSA and GRAND-AM specs, and the driver views a MoTec ADL2 dashboard which displays the engine’s important data. Carbon fiber doors, rear lid, and rear wing are used to save weight. Visible inside the car are the canisters that hold the air-jack system that quickly lifts and lowers the car for servicing.