Bugger, I hate click bait. £140 I spent on there. Anyway, as for your question, exhausts are funny things and on modern bikes back pressure and pipe length is extremely important. If i remove my db killer I lose a ton of torque low down but gain a lot above 7k.The question I would ask is how much time, effort, money and testing do you think they have invested in these pipes in order for them to work properly on your bike. From what I can see the silencers are generic and sold for many makes and models. The titanium ones are pretty though and I guess they're cheap enough to take a punt.