2.5 inch custom catback, 18" resonator, magnaflow muffler. auto, b18b1. ghetto ice box.
Pulls harder with the icebox than sri. Think that took care the problem with low end power.
I guess the catback did make a difference- I can especially tell when I'm going up a hill, it pulls harder for sure.
Wanted 2.25 but I can't get it changed now, I don't think there would be so much of a difference anyway. I've searched plenty on here and google and still have yet to find a dyno comparison of the 2. Don't know how much back pressure that big resonator makes..
According to the guy that did my exhaust, it wouldn't make a difference if he switched it out with a 2.25 catback with no resonator