Someone please explain the difference between a slip on and bolt on for my 04 GSXR 1000. If I put on a slip on do I remove set valve? 2. Will it make me loose my lows and lower mids? 3. Am I better off with a bolt on even though it adds weight? 4. Do I say flip the whole thing and geta a fulll system. One of the reasons I'm asking this is because some shops say why do you want to get rid of your titanium headers and mid pipe, if your not going to race it save your money. Is this right? has anyone did a slip on and power commander? Thanks.