O.S. Speed P4 Gold Super Hot Plug

24K gold plated to commemorate O.S.'s 80TH anniversary
For use in off-road RC vehicle engines with turbo type cylinder head
design such as the O.S. .21VZ-B V-Spec and most .18-.28 off-road
engines with turbo cylinder head
Super hot heat range for smooth idle and fast acceleration
Tapered seat mates perfectly with cylinder head for a superior seal

P4 Gold High Performance Glow Plug