These are the air cleaners studs for the large 1957 air cleaner, you will need a quantity of three of these per unit, price is $12.00/ea. My friend jon Havens has had these special made if you need please contact Jon at jfhavens@sbcglobal.net or call Jon at 314-838-5533. Please do not order these through the shopping cart as I do not stock these studs.