Modified from a P-47D-27-RE
Information from Joe Baugher's web site
(MSN 2964) Republic Aviation Corporation, Republic Field, Farmingdale, Long Island, NY; Modified as a high-speed version to counter the V-1 'buzz bomb' and jet- and rocket-powered fighters that were entering service with the Luftwaffe; Designated YP-47M; Fitted with a new "wet" wing of slightly larger span and area; Designated XP-47N; First flight July 22, 1944
Aeroplane Photo Supply No. 4389