AKG Motorsport E46 Rear Subframe Reinforcement KitProduct Description These BMW E46 Rear Subframe Reinforcements weld directly onto the chassis properly reinforcing the subframe mounting points to eliminate the possibility of a failure. An E46 rear subframe reinforcement kit is the only solution to prevent cracking and or tearing of the sheet metal, caused by torque loads traveling up into the chassis through the inadequate mounting points. Those cars that are swapped, tracked and or raced are