Transferring over 500bhp to the rear wheels through either the AMG Speedshift MCT7 (2015-2018) or the rapid AMG Speedshift MCT9 (2019-2021) gearbox requires absolute driveline rigidity. Under brutal race starts and aggressive cornering, factory rubber mounts easily deflect, leading to axle tramp and lost momentum. While extreme builds pushing the limits of the MRA architecture may eventually seek heavy-duty clutches, lightweight flywheels, and stiffened engine mounts to handle massive torque spikes, securing your foundation is the crucial first step. Eliminate unwanted driveline movement by installing stiffened polyurethane Drivetrain Bushes to ensure every ounce of V8 torque translates directly to the tarmac.