The Wilwood AERO4 Rear Kit 14.00 Drilled Red 2007-2011 BMW E90 Series w/Lines is a complete rear brake upgrade kit for BMW E90 series vehicles from 2007-2011. The kit includes Wilwood's AERO4 14.00 drilled red calipers, stainless steel brake lines, pads, and mounting hardware. The kit is designed to provide superior braking performance and improved braking feel for street and track use. The drilled red finish of the calipers adds a custom look to the vehicle. This kit is designed for an easy installation and is backed by Wilwood's limited lifetime warranty.