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.
K&N makes quality performance products, esecially air filters.
Internet
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/.
no it helps it out
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.
Yes theirs are efficient long as changed on schedule.
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 make some of the best air filters available.
Banks now makes a great exhaust system for your yj, but it can be pricey. also the split pipe 50 series flowmaster. as for air filters K&N is always a good way to go
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.
K&N filters improve airflow to the engine and slightly increase horsepower. They also give the engine a deeper tone when you get hard on the throttle. Horsepower gains are from 5-10 HP depending on the car.