I bought this for my stock AP1 and dynoed it at PRE but it has too much volume for F20 when bone stock. It did pick up in the midrange and i imagine, as did the tuner, if there were supporting mods and the ability to tune there could be some big gains.

Filter is is basically brand new $125 - pretty good deal for an all motor build or F22

Green is the full custom one. Probably bigger with the filter in the well...