I have a Draxas header, f2 flex and nothing but a resonator the rest of the way. I LOVE the sound. The drone isn't that bad (if you ask me). The header and flex are 2 1/2 and the MBRP exhaust is 2 1/4. It took a little to get used to the sound, but now I can hardly hear it. Everyone always tells me how loud it is, but it's normal to me.
2012 Focus Sport, MBRP exhaust, COBB Filter/Snorkel delete, ST Wheels, Toms Tune, Shark fin antenna
SOLD2006 SAP, Draxas Header, MBRPexhaust, CAI, Tuned, FRPP lowering kit, SVT 5spoke wheels, HaloProjectorHeadlights, Mazda rearwiper, mustang antenna