So you put the Leo Vince on and it lost power .
Did you notice the power loss difference from stock?
Seems you must have...
Did it run that much worse after the Leo Vince was installed ?
So now you MUST run it without the DB Killer ,making it "TOO LOUD"?
Could one alter the DB Killer (make the holes larger ) to quiet it down some? To an "Acceptable " Level . Where the neighbours aren't going to hate you , or you get ear ringing after a longer ride?
Losing that much power after spending that much money is Not the way to go.
2011 Red Multistrada Touring
08 Hyper S gone but not forgotten