The McCormick 1425838M92 is a genuine OEM resistor spark plug designed for optimal engine performance in a wide range of agricultural machinery. Featuring an M14x1.25 thread with a 19mm reach and a 21mm hex size, this spark plug ensures reliable ignition. It is a direct replacement for various Massey Ferguson, Landini, Valmet, and Valtra tractor models, providing consistent combustion and durability. This high-quality spark plug is essential for maintaining engine efficiency and reducing emissions.