Last cat I looked at in a box sure didn't look like full flow to me. I guess I'm interested in performance gains or losses with torque, back pressure, etc.
Recently bought 99 Ranger, 3.0L, 4x4, 5 Spd, XLT. Cleaned the mouse nest out of the air filter box, much needed oil change, new spark plugs and wires and a front end alignment. Doing 24 MPG hiway. Commuter, toy and project for my son and I.