Go with a 2.25'' flexback from Magnaflow. the exhaust has no resonator, only a magnaflow mufler, all in Stainless Steel. ;)
And, put a Steeda Short ram intake or cold air intake in it. Exhaust + intake make the duratec sounds really deep.
No need to take off the cat... My car sounds really loud even with it, and will past inspection. eheh
2012 White Mitsubishi Lancer 2.0L : New car
2005 Black Ford Focus zx5 SES : Trade In
2003 Arizonna beige Ford Focus SE : Sold