#6 Hot OSMG2690 A long-lasting plug for most .10-.60 2-strokes
P3 Ultra Hot OSMG2699 For 21VZ-B V-Spec and most .18-.28 off-road racing Turbo head engines
P4 Super Hot OSMG2697 For 21VZ-B V-Spec and most .18-.28 off-road racing Turbo head engines
P5 Very Hot OSMG2711 For 21VZ-B V-Spec and most .18-.28 off-road racing Turbo head engines, especially when the temperature is high or for leaner needle settings and high-nitro/high-rpm running
LC3 Hot OSMG2700 Long reach, for 1/10 scale off-road engines such as O.S. 21TMs and Traxxas® peak needle settings and punchy throttle response
#7 Medium Hot OSMG2713 For 2-stroke airplane, helicopter and car (except Turbo head) engines. Offers stable idling, broad peak needle settings and punchy throttle response
RP6 Medium OSMG2703 For most .12-.21 on-road racing Turbo head engines
LC4 Medium OSMG2708 Long reach, for 1/10 scale off-road engines such as O.S. 21TMs and the Traxxas TRX2.5 & 3.3™ engines
#8 Medium OSMG2691 A favorite for most 2-stroke engines
RP7 Cold OSMG2704 For most .12-.21 on-road racing Turbo head engines
RP8 Cold OSMG2715 Outlast the hottest heats with Turbo head engines
#10 Cold OSMG2693 Ideal for aircraft engines .60-size and up
R5 Cold OSMG2694 For leaner needle settings and high-nitro/high-rpm scale racing
F 4-Stroke OSMG2692 Long reach and long life for 4-stroke engines