2003 Cadillac CTS with RPO Code FE1 Soft Ride Suspension Front & Rear without Performance Brakes with 5 Lug Wheels 2004-2005 Cadillac CTS Base Model with RPO Code FE1 Soft Ride Suspension Front & Rear without Performance Brakes with 5 Lug Wheels 2006-2007 Cadillac CTS Base Model with RPO Code FE1 Soft Ride Suspension Front & Rear with Brake Code JL9 without Performance Brakes with 5 Lug Wheels.