I would resale the 2.4" system he gave me and call it a day (I even tried this to a guy he told me was trying to buy the pipes from me ,but he had already bought other pipes) but Z1 2.4" pipes cost 175 and I doubt I could get the same thing for them used. Their 2.5" cost like 195 now and I wouldn't even mind losing 20 bucks on these pipes (I bought them 175 shipped) but there's no way I would get close to what I paid for them since he ripped me off and sold me the smaller pipes).