The real secret behind any TJ wheelbase stretch kit is a new gas tank with a special clearance notch designed to accommodate the pumpkin. Without such a tank, the axle wouldn't be able to cycle upwards as suspension compresses. Thanks to a clever design, PureJeep's aluminum fuel tank actually holds more gasoline than the stock plastic unit, despite the clearance notch for the rear differential. We like the robust powdercoated steel skidplate that's included to protect the tank from trail damage. We also like the fact that this tank retains all of the factory venting and sending unit mounting methods.