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These are the exact same plug as the factory NGK 4-electrode plugs on all 4.2L BHF engine code engines in the B6/B7 S4. You will notice we sell a Bosch plug as well marked as "OEM". This is because the cars came with either. So pick your preference NGK or Bosch, both were oem parts and in our experience both companies make an excellent plug.
NOTE: 8 per car, if you need all 8 make sure you change the quantity to 8 once you select "add to cart".
TORQUE SPEC: 22 ft lb or 25 Nm.
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