These are brand new, direct replacement thermocouples, designed and manufactured in the USA.
They have the correct and matching electrical connector, correct size and thread compression cap fitting, correct and proper lead size and shielding and correct size and angulation of the probe itself. Note the proper crimp if the pin in the connector. Stainless steel ferrule like OEM. Thermocouples and leads have a finite life and in the severe environment they are exposed to in these cars, are prone to failure.