I bought this pulley because Corteco which is a only decent brand cost £180 where this one was £65 . Price is really good but there is one side efect of that price. On idle there is a noise which is caused by i assume not very good balance of the pulley,what it does is it causes belt tensioner to vibrate when car idles exactly the same like if the car had sized alternator freewheel pulley. At the end we get what we pay