B2871R, AB4204R John Deere Cylinder Head For B, 50

John Deere Cylinder Head. It Has Been Magnafluxed. It Has New Valve Seats Put In It. It Has Been Surfaced. The Drain Plug Hole Had New Threads Put In It. The Plug Goes In Pretty Deep Before It Gets Tight And Needs Thread Sealant On It Or May Need Drilled And Tapped To Next bigger Size. It Is Part Number B2871R, AB4204R. For B Serial Number 96000 And Up To the End, 50 Up To Serial Number 5015950 With Single Induction Carburetor