All the posters above are correct. Glow plugs are not brand specific. Glow plugs are like spark plugs except it does not need current to ignite. All it requires is compression and fuel at higher rpm. For this reason, it requires initial igniting when starting.

The following plugs are popular among rc'ers and racers alike. Adjust the plug heat according to weather. Would want to use colder plug in warmer condition.

OS #8
RB #4/5
McCoy MC 59
McCoy MC 9

Note that Dynamite have a plug called MC 59. My choice is McCoy brand.