530578R3 Muffler Fits International 666 686 706 766 806 826 856 ++ Tractors. One New Aftermarket Replacement Horizontal Oval Body Muffler. Fits International Harvester Tractor Models: H70, H86, 666, 686, 706, 766, 806, 826, 856 Dimensions: Vertical / Oval Body – 5″ X 11″ Shell Dimension Overall Length: 34″ Inlet Length: 3-1/4″ Inlet I. 2-15/16″ Shell Length: 23″ Outlet Length: 8-1/4 Outlet O. 3 Replaces Part Number: 530578R4, 530578R3, 530578R1, 530578R2. About Reliable Aftermarket Parts. Reliable Aftermarket Parts is your trusted source for high-quality replacement parts covering a wide range of outdoor and heavy equipment. We specialize in parts for Lawn & Garden, Snow Removal, UTV, ATV, and Golf Cart machinery, as well as Backhoes, Crawlers, Excavators, Tractors, Skid Steers, and more – covering most leading brands and models in the industry. Our team is here to help you find the right part and get your equipment back up and running. Please note: This policy does not apply to glass or seat orders. Please save all original packaging. If you receive an item not as described. Have questions before you order? How do I know my order was placed successfully? Can I return a part that doesn’t fit or that I no longer need? John Deere, Allis Chalmers, Ford/New Holland, Case, Massey Ferguson & More. Allis Chalmers, International Harvester, Caterpillar, Komatsu & More. Bad Boy, Briggs & Stratton, Cub Cadet, Honda, Sears, Snapper & More. Ariens, Briggs & Stratton, Jacobsen, Toro, Troy-Bilt, Sears & More. Expertly trained staff ready to help you track down the right part every time.