They look nice!... Bit of bling for the bike, but do they serve any practical purpose? couldn't see any for a 2011 848 Evo... Would the 848 ones on there fit?
Silicon hoses offer less resistance to the flow (allegedly), work in hotter higher pressures and last a whole lot longer before breaking down and failing.....or so I was told when I put them on my impreza! But the most important thing is they look like a cooler cooling system ;-)