Real - or counterfeit - England megatone dampers, Norton S-pipes and Dunstall Db dampers are quite expensive. Chinese reference is pretty cheap.
But part of that Chinese offer is so muted that your classic cafe racer under construction - and who doesn't build a cafe racer at the moment? - it can cause breathlessness.
Above a certain speed the Chinese throttle the engine block in its own exhaust gases.
Briefly close that option with your supplier and notify him by e-mail that he will get his things back in case of suffocation.
Because if it looks fantastic, but it doesn't work, then 50% simply misses its goal on a cafe racer
Incidentally, Peters Classic Bike Parts, for example, supplies Dunstall and Megaton replicas made in England. They are only slightly more expensive. And do what you expect from them.
www.petersclassicbikeparts. Nl