20-09-22, 06:00 PM
Personally I think the only place you'll notice a difference is in your wallet 
Yes, if you do a lot of miles, you'll eventually break even with a K&N over eg a HiFiltro pattern replacement, but the difference is marginal.

Yes, if you do a lot of miles, you'll eventually break even with a K&N over eg a HiFiltro pattern replacement, but the difference is marginal.