Curious if anyone has done it this way, using two 4in resonators. I also have Kooks headers and midpipe but removed Solo axle backs for GXP mufflers because it was too loud. I figured this route would make the piping more free flowing and not have the two crossings:
Unfortunately the videos the person posted were removed.
Below are the different lengths I think would work depending on midpipe diameter and from what I gathered in that other forum:
Magnaflow 14419 (3in In/Out Diameter, 4in Case Diameter, 20in Overall length)
Magnaflow 10436 (2.5 In/Out Diameter, 4in Case Diameter, 22in Overall length)
Pypes MVR203S (3in In/Out Diameter, 4in Case Diameter, 14in Overall length)
Vibrant 1795 (3in In/Out Diameter, 4in Case Diameter, 18in Overall length)