They will charge you the sane price as if you bought it from them. If you do not know how to change them yourself why in the heck would You you them? Go to YouTube and watch a video on how to change them. Changing an air filter is easy. Changing an oil filter is harder to change, you have to collect the oil in a disposable pan and then dispose of the oil properly, you cannot dump it down the drain.
I dont know if they will use yours or not. Thw price is usually about 40.
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