A common go-no-go gauge used by racing officials is used to quickly determine
if a carburetor or injector stack bore is larger than legal allowing a motor to make extra
horsepower. Like the double ended plug gauge in the Wiki article one end will be the
maximum legal diameter. The other end will be a slightly larger diameter. If both
ends of the gauge fit inside the bore it is oversize and illegal. No need to accurately
measure the bore with a micrometer, it is quickly determined to be legal or not.