I e-mailed grimmspeed to ask them but am awaiting a response. However I may order it anyways just to see.
I have a PLM header which as a 3" flange mating to the 2.5" flange of the stock and aftermarket overpipe I just bought. Now with this I had to sort of rig it up using a 3" and 2.5" exhaust gasket. Not exactly ideal or efficient.
Short of taking out my header and finding a place that can adapt it to the 2.5" I decided to google around and see if people had soloutions to doing such a thing for those of us without the tools/know how to do such a thing or want to pay a shop to do so..
I came across this...
http://www.maperformance.com/grimmsp...ck-subaru.html
It's meant to mate a 3" downpipe, however I'd imagine it would also work for this application as well and may help me also when I change out my front pipe to my TRD exhaust which uses a donut gasket..
Was not sure if anyone else has seen this before, but figured id share and keep this thread updated as I do plan on ordering it regardless.