THEY WILL NOT REPLACE OEM CTS VENTS. 2 PIECES (TWO PIECES) LEFT & RIGHT SIDEFITS LH (DRIVER'S SIDE) & RH (PASSENGER'S SIDE) FRONT FENDER. 2 PIECES AT A GREAT PRICE!UNIVERSAL FIT. ALSO FITS CADILLAC, CHEVY, CHEVROLET, GM, GMC, FORD, DODGE, TOYOTA, NISSAN, TAHOE, SUBURBAN, YUKON VEHICLES.