[2] The Dundrod Circuit (Irish: Dún dTrod) in Co Antrim, first used in 1950 for the RAC Tourist Trophy automobile race and the Formula One (non-championship) Ulster Trophy (1950–1953), was 7.416 mi (11.935 km) in length and later amended for the 1965 racing season to 7.401 mi (11.911 km) with the addition of the Lindsay Hairpin.

The lap record for the Dundrod Circuit is 3 minutes and 17.928 seconds at an average speed of 134.614 mph (216.640 km/h) set by Dean Harrison riding a Kawasaki Ninja ZX-10R during the 2017 Ulster Grand Prix.

[1] The race record for the Dundrod Circuit is an average speed of 133.180 mph (214.332 km/h) set by Bruce Anstey during the 2017 Ulster Grand Prix.

[3] The race record for the RAC Tourist Trophy on the Dundrod Circuit is 7 hours, 3 minutes and 12 seconds an average speed of 88.32 mph (142.14 km/h) for 84 laps (622.96 miles/1002.518 km) during the 1955 RAC Tourist Trophy race held by the works Daimler-Benz entry of Stirling Moss/John Fitch driving a Mercedes-Benz 300 SLR.

Findlay's victory on a Suzuki was also notable for marking the first 500cc class win for a motorcycle powered by a two stroke engine.