Hi guys. I'm curious to know more about the midpipe for an N/A p5. From my Ractive 4 to 1 header, there's a flex pipe, then 2.25in pipe, then a resonator, then 2.25in pipe all the way to the back connected to Magnaflow muffler. My question is: Is there more power to gain by adding 2.5in midpipe...