Yo, I’m going to get a new slip on pipe for my 450. I’m leaning towards the Leo Vince because it is supposed to be quieter. And It is supposed to have a pleasing deep tone to it. And I believe it is 1.5 inches shorter then stock. The FMF is supposed to be shorter too. Both are claimed to be lighter then stock. I have no real idea. Because I’ve only seen them on youtube. The Loe Vince is supposed to come with 2 inserts 94db and 98db. Anyway. Do any of you guys have experience with these pipes?