2009-2011 Cadillac STS 298mm Rear Disc; 5 Lug; Base Brakes. 2006-2008 Cadillac STS 303mm Front Disc; 5 Lug; Standard Brakes. 2005 Cadillac STS (JL9); 303mm Front Disc; Standard Brakes. 2006-2007 Cadillac CTS Base Standard Susp.