This kit is a top overhaul gasket kit for a WW2 Harley Flathead 45 WL WLA motor. It is a genuine Harley-Davidson brand kit, with part number HRD-55-40. The kit is unopened and in its original packaging, ensuring that all the parts are complete and in good condition. It is compatible with other Harley-Davidson models, making it a versatile addition to any motorcycle enthusiast's collection.