Just wondering, I'm about to order some new NGK plugs for my truck. I know I need colder plugs but I'm stuck between the 55s and 6s. I wont be running N20 all the time because I drive 98% on the street because I"m still buying mods. I will be spraying a 125 in a while. I just dont want something that will foul out while just normal driving. So 55's or 6's? Thanx.

 

for now i would go to a tr55 and gap them at 40 if you are going to be spraying. that is what i was running for a long time with no problems at all.

 

After a lot of research, I went with the tr6. I dont use nitrous too often so my opinion on them is not very good. The truck just doesnt run right with them. It may be because of the 30-40 degree weather up here.