I tested the resistance in all 4, they were within the range of .5 to 6 ohm — be careful not to damage the tip, you need to move it around to get the correct reading. The plugs are already gapped correctly to .43. I used dielectric grease on the white ceramic of each plug — not on the tip. The only issue is the amount of torque required. The QR code on the box pointed to Denso site, but the instruction is nowhere to be found. Based upon how tight the original spark plus were — they were really tight; I did half turn after finger tightening. As it turned out, the torque value should be 18 ft-lb. You should always double check the torque value from official source and not yourtube. If you don’t have a torque wrench, I would shoot for half turn, a little less is fine. It’s not rocket science. Use a magnetic socket or one that has the rubber insert that traps the spark plug in the socket, you don’t want to it to drop from the socket and damage the tip. Also, if the socket with the extension is not an one-piecer, tape the socket to the extension with duct tape, you don’t want to pull out the extension with the socket stuck to the spark plug inside the cylinder. Do the manual tightening very gently, don’t cross-thread it. The new plugs run fine, no misfiring, no trouble code. The engine feels smoother and more responsive. Read more