Comprehensive carburetor repair kit for Zenith carburetor numbers 13320, 13326, 13450, 14990 (6-Cyl JD Only), 15099 (6-Cyl JD Only), or 15108 (JD Only).These carburetors are often found on JD 4000, 4010 and 4020 tractors. Please read the carburetor ID number on your carburetor before ordering parts to ensure proper fit.