Yea before i even started this thread i looked behind the grill. so it is possible to go 3' all the way around? if not i was just going to do the 2.75' but if you can fit it i will go with the 3". I was going to order everything today but that one comment made me have second guesses. I am going to run that mendrel double bent pipe that resembles our stock plastic tube, then a coupler to a 90 degree silicon bend, then to the filter. Does that sound right?