The Kramp 2666108N Thermostart is a high-quality aftermarket replacement glow plug designed for reliable cold starting in Perkins engines and a wide range of agricultural machinery, including numerous Massey Ferguson tractor models. This 12V thermostart features an M18x1.5 thread, ensuring precise fitment and optimal performance. It directly replaces OEM part numbers such as Perkins 2666108 and Massey Ferguson 1850468M1, providing a cost-effective solution for maintaining engine efficiency.