This one piece stretched smooth top gas tank will give your FXR the long, slippery stretched look and flowing lines as found in our other stretched tanks. The stretched section is not a weld-on part but an integral part of the tank and has a seat pocket to match with most narrow seats. Tank will hold approx. 4.2 gallon of fuel (15,9L.) and is available with single or dual Screw-In type gas caps, single or dual Quick Cam lockable flush mount gas caps, Aero-style gas cap, and with the newest Pop-Up gas cap in a paintable and a chrome finish.