BRAND NEW PART # 38-0106 3.1 GALLON KING GAS TANK Direct replacement on 1955-1978 Sportster models. MAY ALSO FIT SOME BOBBER, CHOPPER & CUSTOM King tanks are made 2 in. wider than stock Provides extra mileage and is just wide enough to make it look great 3.1 gallon, high-tunnel tank. All tanks are shipped unpainted. Caps are not included. Direct fit on 55-78 Sportsters 16-3/4″ from hole to hole (Mounting Points) Tunnel is 4″ in front and slopes to 1/2″ at the rear Right side petcock Tunnel width 2″ Approximate 17 1/2″ Length Approximate 10 1/2″ Width