Hi everyone! I decided to go with this exhaust because I like loud pipes and the fact that it has 3 inch pipings which I could still use later on if I decide to have a forced induction is a bonus. Anyway, I crossed into this problem when it was about to be installed. It hits a black box near where the flange is to be placed. I talked to a shop from Japan and found out that this box doesn't exist on JDM z34s so they have no idea on this matter. I have read Vancouverz34's install but more inputs could be a lot helpful. As much as possible I don't want any modifications but if there would be no choice I hope someone here could really tell me the proper way of relocating that black box which Vancouverz34 pertains to as charcoal filter. I hope the shop owners here could put their inputs on this as I'm sure that they have pertinent data regarding this matter. Thanks!