Good to know, thanks again for the insight guys. According to your observations it sounds like someone must have tinkered with the exhaust system and that's why it sounds so loud, I don't mind but the old lady across the street does .

I did measure across the pipe, not the angle, but I measured it at the end. You can see in the photos that the end is slightly bigger than the rest of the piping so it may not exactly be 2" all the way down...and I think you are right Chris on both points about my Lotus colleague.

As for extractors / headers (assuming they are the same) anything I need to know before buying a set? I just want to make sure I don't buy a set and have a mechanic tell me they won't fit. Thanks again in advance.