AEM Dryflow FilterStated benefits:
99.4 percent efficiency (ISO-5011 standard).Can hold a lot of dust before clogging up.Flows almost as good as a cotton gauze filter by making the pleats deep for more surface area.Since it doesn't require oil, there is no chance of over-oiling it when it is cleaned.With no wire mesh, if you drop or hit the filter, there is no metal to potentially damage the filter media.
Made of:
"Single-layer of pre-pleated polyester synthetic filter media with a nylon-reinforced internal cage for added structural rigidity," according to AEM's Web site.
AiraidStated benefits:
Proprietary SynthaFlow and multiple cotton gauze layers (a smaller-than-cotton synthetic material used to overlay the cotton layer and lessen the space between cotton fibers).99.997 percent efficiency (SAE J726 standard, down to only 10 microns).Available prefilter filters down to five microns and is water-resistant."Filters capture almost twice the percentage of particulates that our competitors do," according to Airaid's Web site.Only company that gives thought to soot in the air found in most metropolitan areas.
Made of:
Durable epoxy-coated wire mesh, Synthaflow layer of protection, and multiple cotton gauze layers.
AmsoilStated benefits:
Better capacity than wet cotton gauze or cellulose (paper).Highest efficiency rating in the industry.Better capacity than wet cotton gauze or cellulose.
Made of:
Wire mesh construction with Synthetic nanofibers overlaying cellulose fibers.
Fram AirhogStated benefits:
Allows more airflow than traditional paper fibers.Washable cotton fiber allows reuse up to 250,000 miles.97 percent overall efficiency with 26-28 micron dust particles (SAE J726 coarse dust test).
Made of:
"A four-layer precision woven cotton fiber," according to Fram's Web site.
Fram also makes the tough guard paper element air filters, which filter better than stock as well as a full line of stock paper element air filters.
K&N FiltersStated benefits:
97-99 percent efficiency (SAE J726 test).Retains more dust per inch than paper filters.
Made of:
Four to six ply (depending on application) cotton fiber sandwiched between mesh.
S&B FiltersStated benefits:
99 percent efficiency (ISO 5011 coarse dust test).Offers precision cleaning kit to prevent over-oiling when cleaning.Only company with its own ISO-certified test facility.Only company that tests restrictions across the filter in a controlled environment.
Made of:
Six to eight layer oil impregnated cotton gauze construction.