Hopefully, I'll have mine dusted off and installed next week. OEM pipes will work with the xtra pipe as mentioned above. If replacing pipes before(cat flange)/after muffer, IIRC, vendor recomends 2.25" pipes which I will most likely use.

Good to hear that a resonator will melow the sound a bit without a hit on power or mpg. I guess I'll play it by ear when I have mine installed.