Autoworks
International has designed a mini tub kit that will allow you to
fit 20x8.5” wheels on the back of your Mustang. (Wider wheels
may be possible). This aluminum kit replaces your stock inner
wheel house and gives more room during articulation, thus
allowing larger wheels with out having to sacrifice your back
seat or do any messy cutting of the frame rails. Standard inner
housings have a “U” shape that restricts wheel size, our kit
alleviates that by squaring it off and adding depth that extends
to the frame rail. Installation is straight forward and will
require cutting and welding. Some fabrication may be required.