Paughco Axed Gas Tank with Screw-In Cap - 4.2 Gal. 822CS 4.2-gallon single cap tanks will bolt right to the stock frame They have the late stock-style screw-in filler and vent Includes a Paughco threaded hose line fitting for the vent bung on the bottom of the tank Accepts 22mm aftermarket or stock H-D petcocks and they come with a bare metal finish and have been pressure tested