On their website (pepboys.com), click on the PARTS section, then add your vehicle, then you will see a search box where you can type in any part you want. It will also tell you what local stores (enter your zip code) have the part in stock and/or how long it will take for them to get the part from their warehouse/other stores. :)
@RobNOspam just answered that question with a nice breakdown. Also - you can call them for parts prices
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