Dense spark plugs

Good morning, and greeting all the users of this forum, I have a consultation, I have a 1992 Toyota Corolla and I made a change of spark plug of the dense brand, original replace

Hello, I tell you that in theory a quality spark plug should not be calibrated since this is calibrated of factory.
Apart the ignition spark plugs are calibrated only to verify that it has its correct factory calibration and that it agrees with the specifications of the vehicle service manual, since when it comes to making its installation, this insurance that the spark plugs are properly calibrated, the spark plugs do not require calibration, remember the excess of confidence is dangerous so I recommend that you always recommend that you always give you a view to its calibration. No time.

Thank you very much friend for your fast answer, I will take into account your wise councils, luck ..