Top quality, Japan hand-made MSP Japan S-4 glow plug (medium, short) for 2-stroke engines.

S-4 glow plug is a typical, universal-use glow plug for 2-stroke engines. Works great with cars, planes, boats and helicopters.

Medium plug should be used with medium nitromethane additive to your fuel (best if 5-15%, critical max. 40%), and with rather low-to-medium outside air temperature.

All MSP Japan glow plugs are hand-made in Japan in an precision metal works manufacture with 50 years of model-making experience. Top quality metals used for coils and plug bodies gives you an outstanding, stable engine work temperature and quick ignition, protecting it from over-heating or loosing temperature during the whole run.

Factory MSP Japan markings:

S - Short thread
L - Long thread
T - for "Turbo" type headers

1, 2, 3, 4, 5 - temperature, where 1 = hot, 5 = cold