ORP/HFC Will not make a big diffrences its more removing the resonators that an issue. I have the stock muffler and a HFC, I like the sound but cops that go after "tuners" will now pull you over because your focus doesn't sound like any focus they ever heard! Which I am like you I had a 93 Cobra, with Flowmasters America 45 series, louder then my focus ever! But never been pulled over, was with my friend in his 07 GT with Pype cat back stright and a cop pulls me over and not him "laughs"
CM Stage 3, Alum FW, HawkPS Brake Pads, EBC Rotors, Torsen Differential, Tom's Tune, Rear Tranny Mount, FRSTS, Lunch Box Delete, MSD Coilpack, Massive Wires, Massive Strut Tower, TS Mani, TB, Cam tuning, and Cat Cam.