Transferring nearly 500 horsepower to the rear wheels demands a rigid drivetrain, whether you are operating the 7-speed PDK dual-clutch transmission found in the 991.1 and 991.2, or the 6-speed manual gearbox reintroduced for the 991.2 generation. Under high cornering loads and rapid acceleration, factory rubber mounts deflect, leading to powertrain movement and imprecise gear engagement. 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.