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F4U-4
The first F4U-4 was delivered to the US Navy on 31 October 1944. The F4U-4 was powered by C-series Double Wasp engine. The installed model was the R-2800-18W, later replaced by the R-2800-42W. It had a war emergency power of 2760hp. A four-bladed propeller replaced the three-bladed one of the F4U-1. A chin scoop was added to the underside of the engine cowling. The F4U-4 could reach a speed of 726km/h.
During the F4U-4 production, the cockpit was redesigned again. It now incorporated a flat, bullet-proof windscreen, a revised canopy, an armoured seat, and an improved instrument panel.

Production included 2050 F4U-4s with six .50 guns, 297 F4U-4Bs or F4U-4Cs with four 20mm cannon, a single F4U-4N nightfighter conversion and nine F4U- 4P reconnaissance modifications. The last one was delivered in August 1947. Plans to produce the F4U-4 by Goodyear as the FG-4 were abandoned.

The F4U-4 arrived late in WWII, and served only during the last four months of the conflict. The war of the F4U-4 was the Korean war. Here the type served mainly as a fighter-bomber, but nevertheless one pilot, Capt. J. Folmar of VMA-312, was credited with shooting down a MiG-15.

F4U-5
The first post-war model, the F4U-5, was basically similar to the F4U-4. The air scoop under the engine cowling was removed, and replaced by two small scoops incorporated in the lower side of the cowling. Also, the outer wing panels were now fully covered with metal. The armament consisted of four 20mm cannon, as in the F4U-4B. The engine was the 2675hp R-2800-32W, with a variable-speed two-stage supercharger. The engine installation introduced a lowering of the thrustline by 2.75 degrees, which improved stability and forward view.
The first XF4U-5 flew on 4 April 1946.

There was also a nightfighter version, the F4U-5N. The radar was again, as in the F4U-2, installed on the outer starboard wing. The radome was different in shape, however, betraying the presence of the improved AN/APS-6 and later AN/APS-19A radar set. The AN/APS-6 radar had a range of 8km against aircraft, and 37km against ships.

Production included 223 F4U-5s, 214 F4U-5Ns, and 30 F4U-5P reconnaissance models. In addition 101 winterized F4U-5NLs were built, with de-icing booths for service in the bitter winters of Korea. Production continued until October 1951.

In the late 1950s the US delivered a small number of F4U-5s and F4U-5Ns to the Argentine Navy.