Dynomax 89003 Exhaust System Kit Fits select: 1989 GMC SIERRA, 1988 GMC GMT-400

COMPATIBILITY -- Designed for a variety of full-size 1973-89 GMC 4WD trucks and Chevrolet 4WD SUVs; 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 manifolds 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; tailpipes exit each side of vehicle behind rear tires 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 WARNING -- Not legal for use on pollution-controlled motor vehicles Fits Select: 1989 GMC SIERRA 8 Cyl 5.7 L 1988 GMC GMT-400 8 Cyl 5.7 L 1973-1981,1986 GMC K1500 8 Cyl 5.7 L 1987 GMC V15 CONVENTIONAL 8 Cyl 5.7 L 1973-1986 GMC K2500 8 Cyl 5.7 L 1987 GMC V25 CONVENTIONAL 8 Cyl 5.7 L 1981-1987 CHEVROLET SUBURBAN 8 Cyl 5.7 L 1982-1985 GMC K1500 8 Cyl 6.2 L 1977-1986 GMC K3500 8 Cyl 5.7 L 1987 GMC V35 CONVENTIONAL 8 Cyl 5.7 L 1973-1975,1978-1980 CHEVROLET K10 8 Cyl 5.7 L 1973-1976,1978-1980 CHEVROLET K20 8 Cyl 5.7 L 1976-1977 CHEVROLET K10 8 Cyl 6.6 L 1977 CHEVROLET K20 8 Cyl 6.6 L and more - add your vehicle to our fit widget to check