Transferring over 500 horsepower to the rear wheels demands a highly rigid drivetrain. Porsche equipped both the 991.1 and 991.2 GT3 RS exclusively with the 7-speed PDK dual-clutch transmission to maximise shift speed and track performance. Under high cornering loads and rapid acceleration, factory rubber mounts deflect, leading to powertrain movement and imprecise power delivery. Fitting stiffened polyurethane Drivetrain Bushes secures the transaxle and improves throttle response. For dedicated motorsport builds, installing heavy-duty clutches, lightweight flywheels, and solid engine mounts ensures the drivetrain reliably manages aggressive downshifts and launch inputs.