hi guys! tomorw il hav my car dyno tune.. just want to ask on what sparkplug can i use on my car?? my car is NA it has j's racing intkae,headers,berk testpipe and asm twin exhaust and i have greddy emu on my car i haved read somewhere that its good to use sparkplugs with 9 heatrange for allmotor. what do you guys think?? or how about ik27 of denso iridium??? pls help me thansk!

 

Way too cold for NA. Go with the IK24 or IK22.

 

how about ngk r 8??? thanks!!!