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didnt know if this was poseted or not and should be a sticky because it helps alot of people and is totally free. In the 2005+ Mustangs there is a "Pre-Cat converter" in the intake tract. By removing this you will get 4-5 RWHP!! I just updated my store site so you can see the facts. Have fun Drive safe.
i thought that ford quit putting those in the intakes during the middle of production on the 05's since everybody was just cutting them out anyways...oh well, i know that was the first mod i did back in october of 04...damn my car is getting old