[dirtrancher]

You can also remove the cat by installing a Ford OEM test pipe. Install is only about an hour and you can reinstall your cat later if for some reason you need it.

I bought one a few years back and just finally got around to the install. Truck sounds better, I don't know about any mileage improvement yet.

I have the ford part# on my garage wall at home if anybody wants it. Was about $150 and bolts right in with no modification to the factory exhaust.

 

[dirtrancher]

And what is the Ford part number??

Ford factory test pipe is part# F81Z-5246-DA. It can be found on google from various suppliers for less than $100.

I don't know if it helps performance but it makes removing/reinstalling the cat in the factory exhaust system really easy.