04/30/2009. Remarks by Johan Visschedijk: "Powered by a 350 hp Lycoming TIO-540-NXT Thunderbolt horizontally-opposed six-cylinder engine, the prototype NXT (Neoteric eXperimental Technology) kit-built two-seat air racer was flown for the first time by its designer Jon Sharp on July 10, 2004.

On July 30, 2008, flown by Jon Sharp, N333XT established a world speed record in the FAI C-1b Class (T/O weight 1,102 to 2,205 lb, 500 to 1000 kg) at Reno, Nevada over a straight 3 km course at restricted altitude of 356.34 mph (573.46 kmh).

At the 2008 Reno Air Races, listed as Racer number "3", the aircraft was the first in its class to pass the 400 mph (644 kmh) barrier when it set a qualifying speed of 409.297 mph (658.681 kmh) and it won the Sport Class Championship with a new race record of 392 mph (631 kmh)."