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Why Buy DENSO?
  • Proper gapping


  • How long will my Iridium spark plugs last?


  • Can I use a standard spark plug if my vehicle manufacturer recommends a high performance plug?


  • How Do I Install OE Identical Oxygen Sensors?


  • How Do I Install Universal Oxygen Sensors?


  • Why and When do I need to change my oxygen sensor?


  • Where are the sensors located on my vehicle?


  • What is the warranty on Oxygen Sensors?


  • What is the torque setting for my plugs?


  • What is the maximum I can open or close the gap?


  • What is proper spark plug gap for my motor?


  • What is OBD II, and why is it important?


  • What is a Universal oxygen sensor?


  • What effect do fuel additives and injector cleaners have on Oxygen Sensors?


  • What does an oxygen sensor do?


  • What are Denso Iridium tough plugs and how can I get them?


  • Should I gap my Iridium Plugs?


  • I keep adding parts, But when I go to check out it shows my cart is empty!


  • How much will my freight be?


  • How do I get stickers?


  • How do I get a wholesale quote for a large order of plugs?


  • How do I get a catalog?


  • How do I find a colder or hotter plug?


  • How do I cross reference a part number from another brand into Denso?


  • How can I test an oxygen sensors performance to know if it needs to be replaced?


  • How can I get sponsored?


  • How can I find a high performance equivalent to my regular plug?


  • How can I figure out what the numbers mean on my spark plug?


  • Does an Oxygen Sensor Fail?


  • Do I need to Gap my plugs?


  • Can old spark plugs be cleaned?


  • Can I use platinum plugs with nitrous injection?


  • Can I use Iridium plugs with nitrous injection or a blown alcohol motor?


  • Why don't you show any parts for my vehicle?