The Nanofiber filter is probably the best filter out there for filtration (2 microns). The only issue we have had with them is with trucks producing high H/P #'s like over 600+ because they filter the air so darn good that they will not flow the big air these trucks need, and the filters will restrict flow. it isnt about boost#'s either it is about CFM of air flow, flow makes power not boost. so you have to ask yourself what is more important to you excellent filtration or high air flow. there is a fine line between the 2 and Icebox will supply whatever filter you need. i will recommend for 90% of the applications the nanofiber filter the other 10% will need a filter that filters less but flows more.
John:thumbsup