This is the P4 Turbo Glow Plug for use
in the OS Max .21VZ-B VSPEC and .21VZ-B Speed Tuned Engines.
FEATURES: For use with fuel containing 25% or greater nitromethane content
Also works well in most .18 - .28 cu in (2.9 - 4.6 cc) off road
racing engines with turbo type racing heads
INCLUDES: One glow plug