Do you whistle while you drive down the road or is it your car making the noise? This seal fits on the leading edge of the quarter windows and seal up against the back edge of the door windows when the doors are shut. Replace this seal and you will notice a big improvement in wind noise inside your car. Fits 1965-1966 Buick LeSabre, Wildcat, Electra and Invicta as well as 1965-1966 Cadillac, 1965-1966 Chevrolet Impala, 1965-1966 Oldsmobile 88, 98 and Starfire, 1965-1966 Pontiac Catalina and Bonneville, sold as a pair.