i'm sure the 92z do as well, but i dont know about the 96r. 96 is louder than 92, i'm not sure what the physical difference is between the two, it might just be a difference in terms of the size of the strictor, or that one has restrictor one doesnt
kakimoto states on their website that 06R is a hybrid of 92z and 96R + the titanium looking tip
but i was told that 06R is just 92Z with the ti look tip, the db rating on kakimoto's website is 93db for 06R, so it kind of makes sense, but i've never compared it before