I'm in Docklands - get in touch if that is convenient. I've now had chance to extend the Cayman post exhaust. What a difference! There is far more real world "out of roundabout" performance. Feels a lot more like a 911! Sounds good too. Much meatier but not hooligan loud to piss of people in the village. More importantly to me it's not a pain on a motorway and the guys at AMD - see earlier post above - did a great job fitting it with no rattles and bangs. Have to say, as someone whose last attempt at "tuning" a production car was a 1650 Cortina in the 70s, I'm delighted with the investment.