4.2 gallon (15.9 liter). Low tunnel. Single cap. Styled like the classic Mustang gas tanks but elongated to fit customs with stretched top tubes. All are constructed to take a stock style 83-up screw gas cap and a 75-up style 22mm petcock. Petcocks are installed on the left side and the tank includes a threaded hose line fitting for the vent bung on the bottom of the tank. Available in low or high tunnel version. Approx. dimensions: 12″ (30.5cm) wide, 22.5″ (57cm) long, 10″ (24.5cm) high, tunnel length 22.5″ (57cm), tunnel width 3″ (7.6cm), tunnel depth 3.5″ (8.9cm), 19″ (48.3cm) cen-cen mount hole. Note: It is advised to pressure test, seal and test fit all tanks before tanks are painted and installed. Some tanks are painted, but this coat is applied for rust prevention during storage only.