I installed this pipe on my 14 GT500.The fit is very good.When removing the stock catted pipe,the upper right side O2 sensor is really hard to get to the plug to unplug it.So don't,just break it loose and unscrew it and let the wire twist around.When reinstalling it just twist the wire so that when you screw it in it will be about right.The new pipe came in 3 pieces and that's how i put it in.I put the right side on[left nuts loose] then the left side[left nuts loose] and the center[put the clamps on the center before install].Slide the rear clamps forward to hold the pipes and then put a jack under the center to hold it up where i wanted it.Tighten the manifold nuts[15mm] evenly,look it over,then tighten it all up.Install the other 2 O2 sensors[22mm or 7/8". I decided on the H pipe because i didn't want the raspy sound of the X pipe. [To each their own].You will have to have the rear O2's turned off with a SCT or similar. A good time to also go with a throttle body,CAI, and tune from Lethal.The pricing i got from Lethal was good and like i said the fit and look is really great!
