I have been told from a dyno guy that the Uni and Twin Air filters much better and the difference in flow is not noticeable.
I have always run K&N but I will be putting a Twin Air on my Ruby. If you are running K&N you just have to make sure you keep clean.
I have always run K&N but I will be putting a Twin Air on my Ruby. If you are running K&N you just have to make sure you keep clean.