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Actually being serious here. Seems like all they sell is junk. I've had better luck with Rock Auto parts than I have with autozoo. Oreilly's seems to have decent stuff. NAPA or Carquest seem to be geared more toward supplying the mechanics who change this stuff out for a living with Oreilly trying to catch on in that market. While that's not foolproof, it gives you a hint of where to shop.