Hi My experience is not directly linked to your question, but you may get some use from it: I fitted an ITG panel filter to my scooby impreza turbo and noticed no change what soever, apart from the ommission of the new paper filter at service time, so in the long run, the K&N panel would pay off. I fitted a pipercross induction kit to the Volvo 850 T5. This was a poorly design installation and the kit had lots of movement in it. It didn't increase performance, or benefit the car any other way - so I sold it, and lost about 50 quid in less than a week on it. I'd put a panel filter, but only as a long term investment. Add