COMPATIBILITY – Fits 1978-1980 Buick Century; 1978-1979 Buick Century; 1978-1987 Buick Regal; 1981-1985 Buick Regal; 1986-1987 Buick Regal; 1983-1988 Chevrolet Monte Carlo; 1983-1983 Chevrolet Monte Carlo; 1978-1984 Oldsmobile Cutlass Calais; 1979-1980 Ol GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase COMPATIBILITY -- Designed for 1978-1987 midsize sedans such as Oldsmobile Cutlass, Chevrolet Monte Carlo, Buick Regal and Pontiac Grand Prix; see product information for compatibility and engine spec BUILD IT YOURSELF -- Design and custom fabricate your own exhaust system with this kit that attaches to OE headers FLEXIBLE MOUNTING -- Special reducer design allows for a variety of mounting options IMPROVED FLOW CAPACITY -- Smooth bends improve flow capacity over traditional bends SPECS -- Extra-long tailpipes with side exits with a full 2.25-in. diameter; tail pipes exit on each side of vehicle at rear bumper COMPLETE SOLUTION -- Includes all the necessary clamps, hangers, flanges, gaskets, mounting hardware, intermediate, extension and tail pipes PREMIUM MATERIALS -- Made from quality aluminized steel for durability and long life BETTER TOGETHER -- Complete your system with premium DynoMax mufflers and DynoMax accessories for a complete performance exhaust system