Mine is 105 with dB killers
All down to how the measurement is made, what's around it and a heap more vague stuff that always has an impact. My stock pipes measured 104db @4000rpm at Brands Hatch, 99db @4000rpm at Castle Combe and I'll be able to tell you what they do at Goodwood in a couple of weeks. Guarantee it'll be different again, as noise measurement is kinda like that - way too sensitive to be consistent in my view. Bear in mind that a 3db increase represents approximately DOUBLE the 'noise' and then you'll appreciate the pot-luck we all take when sat in line for the infamous sound test before going on track.....
Bottom line is that the stock pipes are too quiet IMHO, so a market definitely exists for more sound (and to a certain extent, performance of course) via aftermarket pipes. MMC do a true Straight-through in chrome (U310021 / U310022 - £198.90 + vat each) or what they call 'Noisy', which have the main front baffle, but none of the weld-in circles-with-holes baffles anywhere else (U310019 / U310020 - £191.25 + vat each). I personally think the Noisy would be the best compromise, but a properly designed replacement with a true motorcycle-type absorption silencer under the heat shield (as I've droned on about at length before!), would I think be the best solution.
