There are many good places to online to buy air intake filters. For a good review of what filters are best, you may find a good review at the following website: http://www.autoanything.com . You can find k and n filters at K and N Filters website at www.knfilters.com/cold_air_intakes.htm, or at the Official K and N store at store.knfilters.com/.
K&N air filters can be purchased both online and in stores. Stores such as O'Reilly Auto, K&N Store, KN Filters, Amazon, and 4 Wheel Parts all sell K&N air filters.
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K&N. 40-60 dollars depending on type needed. Lifetime warranty. Can be cleaned and not replaced. Can also buy the oil spray for filter and seal spray. Go to K&N filters on google.
One can purchase K&N air filters at the local K&N dealers or installer, such as 12Tune International BV, BCCP Fuelsystems, EFKA Import or HOCO PARTS BV.
K & N make some of the best air filters available.
If you have a really well built engine that pulls a lot of air and has a fairly small filter then maybe. Instead of going with two filters just invest in a good K & N air filter. It flows more air than the regular air filters.
Yes theirs are efficient long as changed on schedule.
No, They allow air to flow more freely then stock air filters. On a standard carburetor engine they can reduce the amount of fuel used, because, less vacuum is needed to draw air into the engine.
Try S&B Filters they are better than K&N. The duration of the FIPK for like 5 years and you can find out which one will fit the FIPK. K&N's Universal Air Filters are designed and manufactured for a wide variety of applications.
K&N makes quality performance products, esecially air filters.
I did not find any specials currently being run on K&N Air Filters, however I did locate a couple of online resources you may want to check out. Auto Anything offers free shipping and offers to beat the price you find for a K&N filter you find anywhere else. You can check out their selections at http://www.autoanything.com/air-filters/60A2090A0A0.aspx. Autoparts Warehouse is offering free shipping with purchases over $50 and you can see what they have to offer at http://www.autopartswarehouse.com/air_filters~pop.html.