The fourth and last XP-51 was the first P-51 delivered to the US Army. It was transferred to NACA in 1942. The aircraft was placed in storage for the National Air Museum (now the National Air and Space Museum) in 1949. Acquired by the EAA in 1975, it was restored and flew again in 1976. Last flown in 1982, it resides in the EAA Museum and is taken outside for display on special occasions.