Prob ignorance and inexperience on my part, but for the cold air intakes like this https://www.northamericanmotoring.co...ct/9079/cat/56
Are the filters washable or do you have to buy new ones all the time? Are they worth the investment?

 

Those are washable filters, I think you can use the K&N filter cleaning kit to clean/oil it but I could be wrong. How abt ask the seller?

 

With the aFe filter, you can actually get the aFe recharge kit and you would be good to go! I have the dry element filter and I love it.. Much easier to clean and maintain and you can get them from these guys here.

http://www.vacmotorsports.com/

 

With any cone filter it can be cleaned and reused. If you don't get the K&N recharge kit (you should) I think they have directions on the K&N website that should guide you along the proper washing technique.

 

Yeah, the cleaning kit is a must if you go this route. Pretty easy to do. I had a cone filter from BMP on for bit (very similar to the one listed) and although it sounded nice, the perceived power actually seemed to lag a bit in the low-mid RPMs.
As far as whether or not it's worth it; depends on what you're after - aesthetics vs. performance. My experience has been that the greatest gains in my car have been with a K&N drop-in filter with the stock air box.