Often, if your car has damage to the front or rear clip, you may be forced into a fair amount of disassembly so that you can identify the extent of the damage. One area of concern should be the fuel cell as well as the fuel-cell cage at the rear of the car. If you take a hit to the rear of the car strong enough to tweak the metal casing of the fuel cell, Hargett recommends removing the fuel cell before trying to pull the rear clip back into shape. This is because the hit was hard enough to bend something in the fuel-cell cage and tweak the metal casing of the fuel cell. If you tried to straighten it out, it could damage the cell even more. If, however, the fuel cell is undamaged, it is usually okay to try to straighten the frame with the fuel cell installed.