Original sentence: Its supporters claim that these bans have arisen because of its phenomenal success against bigger and more powerful sports cars.The Caterham has been banned from FIA competitions and most international races.They claim it has been declared "too fast to race"
Edited sentence: However, the Caterham has proven so successful against bigger and more powerful sportscars that it has been banned from FIA competitions and most international races, coining the phrase "too fast to race"