O.S. Engines P4 Super Hot Off-Road Turbo Plug
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 engine.