I spoke to a gentleman in Malvern a few years ago who had his S1 converted to sidepipes as I was quite interested bought the alloy trim finishers and a very good price from Long life to do the job. He said they did drone a bit on a long run so as not to upset the co driver gps and wife who let's me drive everywhere with the top down I decided against it, they do look and sound superb though. I must say that of all the cars that have come and gone over the years the old Bmw v8 is the cleanest engine around the exhaust tips no black carbon at all shame we can't pass a petrol station without having a drink Eh........