Ti be fair , I have a Pipercross in my little car
I did it because it does give a bit more MPG and bit better throttle response
But to be fair nothing major , dont expect anything major , as it is just a panel filter
I had one mainly as they last alot longer
So in the end it saves me a bit of money , as I replaced my OEM filter every 20k
£10 ish for an OEM one , £28 for a Pipercross one (all + VAT)
So after 60k on the Pipercross , it saves me £2
So then I bin it and get a new one......does me proud
But a few have said that they have no noticed anything....but hey , its not going to break the bank , so may be worth a try
K&N are the market leaders , have been for a while
Sarah