Rear Coil-Spring Insulator For Buick Riviera 1966-1975, Skylark 1967-72; BN 111 'Replacement Filter'] High clearance Cat-Back(tm) system tucks

High clearance Cat-Back(tm) system tucks above frame rails

minus AWE drone-canceling 180 Technology resonators in the rear

Designed without harmful PVCs

GMC Canyon SL 2008

making them ideal for heavy-duty applications such as towing or downhill driving

Rear Coil-Spring Insulator For Buick Riviera 1966-1975, Skylark 1967-72; BN 111 'Replacement Filter'] High clearance Cat-Back(tm) system tucksFor classic cars like the 1961 1976 Pontiac Bonneville, Catalina, Grand Prix, and others, as well as the 1967 1972 Chevrolet Chevelle, El Camino, and Buick Skylark, these rubber coil spring insulators are essential for a smooth and quiet ride. Measuring 3 3 4 inches in outer diameter, 2 1 8 inches in inner diameter, and 5 8 inches high with a 3 16 inch wide bottom flange and 1 4 inch thickness, they are designed to fit precisely between the coil