The JDM bumper is a different shape than the USDM one (shorter nose), so it needs a different bumper beam (the 3' galvanized steel thing) and absorber (the white styrofoam thing).
The plastic inner fender liners are different too as they have a portion that reaches all the way forward to the bumper. Could the USDM ones be trimmed or bent to fit? Probably. I had a damaged fender liner when I replaced my bumper so I got the JDM fender liners too.
It should fit the shape of the headlights no problem though. However, there is a steel bracket (painted black) that holds the headlights in place that I think the bumper won't fit onto correctly. There are JDM plastic brackets that I replaced the steel ones with.
Also, my JDM bumper does not have a perfect fit on my USDM Legacy. I think the absorber needs to be trimmed just a tiny bit to make it fit a little better, though I haven't done it on mine yet.
Also fyi ... the USDM (Legacy) fog lights do not clip in to the housings in the JDM bumper. The lights physically fit in the housings pretty well so I assume that it can be pretty easily modified to work (haven't put my fogs back in yet), but the plastic tabs and clips are in different places, so they don't lock in automatically without some kind of solution. Looks like that JDM bumper might have JDM fogs to come with it, but I would check to be sure ahead of time.
Finally, the USDM grille will not fit the JDM bumper. At all. They look very similar in shape and styling, but the JDM grille is at least an inch taller. Again, looks like the grille may come with the bumper there above, but check to be sure. Fyi ... that's the best looking JDM grille, imo. It's the same one I have (color matched to ABP though).
It's not a hard swap, by any means, but there are more parts than one would expect. I don't personally know to what degree one can modify the USDM versions of the above parts to fit that bumper and others may have suggestions, but I got a few extra JDM bits (bumper beam, absorber, fender liners, headlight brackets, grille, but not JDM Legacy fog lights) to do the swap with.
Also note, this info all refers to a 2005 USDM LGT wagon, not a 2006 USDM 2.5i Outback, so YMMV (Legacy and Outback fogs are completely different obviously). Fyi ... that lip in the picture is not stock on that bumper. It may be Subaru or aftermarket and it may or may not be designed specifically for that bumper (looks like it is).
I have no idea what I am talking about.
Last edited by Dujo; 01-20-2013 at 10:59 AM..