I have a bit of a mongrel MC18 R4J with R5K pipes on it, its never had exhaust hangers on it which im not keen on so want to fit hangers from a R5K but although the parts manual shows both the R4J and R5K share the same subframe although in my opinion they clearly dont as the subframe mounts for the hanger is a long way from the mounts on the cans. Am i overlooking something or are the subframes actually different?