AVPlug × 4 (Model "B")

AVPlug × 4 (Model "B"). AVPlug (Model "B") is 7 or 6 mm longer then AVPlug (Model "A") and dose not require you to remove the top threaded section of the core spark plug. (Model "B") utilizes a brass Nyloc M4 nut on the top of the core spark plug. Please Note: We do not sell core spark plugs, these spark plugs can be purchased from Amazon or Ebay or at your local automotive dealer. The reason why we do not sell core spark plugs, is because it is cheaper for our customers to acquire them locally.