GASKET SET, TOP S.57549 770, 780, 880, 885 K262754, K964876 For David BrownOne New Aftermarket Replacement Top Gasket Set for David Brown Tractors This upper (top end) gasket set covers the cylinder head and associated upper engine assemblies on David Brown 3 cylinder diesel tractors fitted with the AD3 49 or AD3 55 engine. The kit includes a head gasket, valve cover gasket, intake manifold gasket, exhaust manifold gasket, exhaust pipe gasket, thermostat gasket, copper stamp, and injector seals everything needed for a