I'm well please with the result considering this was JP first attempt, its louder overall, but for all the right reasons

Price? £150each

I'm pleased to hear that you are delighted with the result Kin, when do we see a photo of it in situ? But, even more importantly when will you post a recording of it at different revs and/or speeds?
Do you have any idea what the maximum sound level is, were JP able to measure it, will it preclude you from track days? It does not seem overly expensive and I am sure that some other Aero Side Pipe owners will consider following your lead. Well done.