The 450+ Club: Piston-engined warplanes (and one racer) that went beyond 450 miles per hour

Whether by massive brute force, beautifully sleek aerodynamic form or a combination of both, a small number of piston-engined aircraft achieved flight speeds of over 450mph. These speeding monsters were the ultimate expression of the high-performance piston aircraft.
Hughes XF-11 (1946)

Top speed: 450mph
Mikoyan-Gurevich I-225 (1944)

Top speed: 451mph
Supermarine Spitfire F Mk 24 (1946)

Top speed: 454 mph
Martin-Baker MB 5 (1944)

Top speed: 460 mph
Grumman F7F Tigercat (1943)

Normal top speed: 460 mph
Messerchmitt Me 209 (1938)

Top speed: 469mph
Focke-Wulf Ta 152H (1944)

472 mph with nitrous oxide boost
De Havilland Hornet (1944)

472 mph
Dornier Do 335 (1943)

Top speed: 474mph
Heinkel He 100 (1938)

Normal top speed: 420 mph
Maximum achieved: 466 mph
Did it enter service? No
Republic XF-12 Rainbow (1946)

Top speed: 470 mph
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North American XP-82 Twin Mustang (1945)

Top speed: 482 mph
Hawker Fury/Sea Fury (1944/45)

Top speed: 483mph (Sabre Fury)
(Centaurus Sea Fury – in race mod, 510+ mph)
Supermarine Spiteful (1944)

Normal top speed: 483 mph (Seafang naval variant 475 mph)
Republic XP-72 (1944)

Normal top speed: 490 mph
Maximum achieved: 494 mph
Republic XP-47J Superbolt (1944)

Top speed: 504mph
Grumman Bearcat (1944)

Normal top speed: 455 mph
Maximum achieved: (Rare Bear racer) 528.315 mph
North American P-51 Mustang (1940)

Normal top speed: 440mph
P-51H: 487mph
Maximum achieved: average speed of 554.69 mph+ for Voodoo racer derivative
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Notes
Northrop XP-56 Black Bullet
465 mph – probably not tested to this speed
Kyushu J7W Shinden
470 mph often quoted (probably an unofficial estimate)