problem with the overseas stuff is the bends dont always comeout like they plan , like downpipes , even though one may slide right in another will hit the frame or have other clearance issues , the 3.5 china pipes are one of those that one goes great and then another supposed to be the same needs to be cut to fit
when it comes to exhaust you get to play the how far can i push it this way and that way to make it clear , sometimes flexing pipe , twisting the tailpipes toclear springs and swaybars , changing the hanger heights and once its in and not touching anything i usually end up tacking the joints so it stays there, the atr wasnt much better becuase 3" is tight but it could be installed to fit . having aftermarket upper conrtol arms helps with the tailpipe clearance
have one to do soon from GN1 and ill let you know how the new stuff compares to the older stuff