Just to add I bought a FR Borla for the 2.3 center exit setup for $150. Next day I bought the FR Borla for the zx4 sedan w/ resanater for $200. And sold the center exit, to one of my buddies. I can't beat the price or quality or sound. It is 2.25 & T-304 stainless. I cut off the little mini cat after the flex pipe. That was back in '07 thou. And my buddy at Bickford ford let me know.