Ramair and de-cat/better flow collector also gives you a sweet sound of a big engine pumping air. I love it (reminds me of an AC cobra) bub, bub ,bub ,bub
De-cat/better flow collector should come with ear plugs depending on pipe config. (my pipes are slashed, needed to add bits to quiet them down)
Ramair and de-cat/better flow collector makes the bike sound and feel like a 2.3 litre machine should. I have never heard anything as satisfying
there are a number of tunes, some very aggressive and some more balances. Another great thing a bout the rocket and this site. You can tune for your bike and your preferences.