inserts

My new bike came with an aftermarket exhaust (Scorpion, I think. There's an "S" logo on the tips), along with a set of silencer inserts. I find the exhaust annoyingly loud. How do those inserts fit in? I assume it's not just a friction fitting, but there's some kind of bolt that needs to...

I have a set of Two Brothers cans with P1X Race Pipe Power Tip Insert - Yamaha FZ6 (2004-09) Dual M-2 Titanium canisters - $450 PI Race pipe inserts new $25 Pair of 05 FZ6 Forks with Race Tech Spring inserts, only 2k miles. Direct bolt on - $250 Black FZ6 front fender - new - $30 Used Blue...