McGuire was a Formula One racing car constructor founded by Australian driver Brian McGuire. The team participated in one Formula One World Championship Grand Prix but failed to qualify.
Brian McGuire first started to race in the British-based Shellsport G8 International Series in 1976, as a private entry with the Formula One-specification WilliamsFW04. He also entered the car for the 1976 British Grand Prix but was only listed as a reserve and never made it on to the track. For the 1977 season McGuire made extensive modifications to the Williams and it was entered for the 1977 British Grand Prix as the McGuire BM1. However, the car was uncompetitive in the special pre-qualifying sessions, slower than all the other entrants except Mikko Kozarowitzky who had an accident, and McGuire failed to make it through to the full qualifying sessions.[1] Brian McGuire was killed at the wheel of the car at Brands Hatch later in 1977.
Although World Championship races held in 1952 and 1953 were run to Formula Two regulations, constructors who only participated during this period are included herein to maintain Championship continuity. Constructors whose only participation in the World Championship was in the Indianapolis 500 races between 1950 and 1960 are not listed.