It sounds alot deeper , grumble, loud but a nice loud! Everybody hears you before you are coming , go through town or a built up area everybody wants you to rev it
Small 3-5 year old childern love it lol just stop and stare , the induction on the carbs sounds fantastic , pops and bags from the air box on over run and some out the exhaust , really happy with it
As she is on carbs and these are slip-on's to the link pipes , no fettling is required with jets but I am sure you could optimise it a bit more
In terms of performance , to be honest she seems quicker , bit more instant , keeps on pulling but I am not too sure if this is the combination of the increased sound adding to the illusion , but she is happier with the open exhaust