GMPartsGiant.com offers the wholesale prices for genuine 2013 Cadillac CTS Coupe parts. Parts like Brake Caliper/Front are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L, 6 Cyl 3.6L, 8 Cyl 6.2L. Model Code: 2 DOOR COUPE, V 2 DOOR COUPE.