The Wilwood AERO6 Front Hat Kit 14.00 99-06 BMW E46 is a performance upgrade for the BMW E46. It features a lightweight aluminum hat designed to reduce unsprung weight, as well as improve brake cooling and performance. The kit also includes Wilwood's signature AERO6 calipers, as well as performance brake pads and stainless steel brake lines. This kit is designed to provide superior braking performance and improved handling for the BMW E46.