What spark plug.

[spike.1965]

I have a FG Baja 29cc with tuned pipe, 2 23cc stock FG Monster trucks, a 26cc FG Monster truck and a 26cc Marder, What are the best spark plugs for these cars.

 

[Whoduh]

I'm using E3 .24 spark plugs right now.
NGK CMR7 is what most people are probably going to say to use though.

 

[MrFnisse]

Would personally never use anything but NGK CR7HIX / CR8HIX
Had much less issues with those compared to the common CMR plugs.