Unlike those who fit a replacement system then (of which you never seem to pass comment)....
It's not that much work or expense, it won't be loud enough to annoy the neighbours but (hopefully) pleasant enough to satisfy me.
I'll stop polluting when I stop riding, oh and driving, oh and eating, buying products, going on holiday blah blah. Guess I better scrap my dirty polluting carburated classic bikes, I'll have a word with the neighbour too as he regularly uses his lovely (re polluting) old classic cars
I don't see cats/egr/dpfs etc fitted to NASA rockets or aircraft, what about the worlds shipping belching black shit out day & night....
My work a few years ago saw me burning literally hundreds of gallons of diesel a day in rather basic diesels, still do a bit of it now.
The whole of our modern lifestyle is polluting.
Americans don't just fire guns, they also drive round in f***ing big auto v8s. that's OK then.
I regard your input with high regard, not this time.