my car is has test pipe, and intake. for sure i'll go 1 step colder then stock, but wonder if it'll be a bad thing to go 2 steps. what spark plug is good for my setup. and which brand will be better DENSO or NGK?

Denso Iridium:
IKH-20

NGK Iridium:
LFR6AIX-11 or LFR7AIX-11

if you guys have any pass expereience with any of the spark plugs, please give me some advice. thank you!

Jackie

 

i have the ngk 1 step colder

 

I've used the Densos with my nitrous and NA setup on and off the track and they have worked fine

 

NGK's here. Been great so far, and cost less than the Densos.

 

+1 for NGK

 

why on earth would you run a colder plug with such little mods...especially without FI?

 

coz i throught 1 step will make the car smoother, coz is 1 step cooler too much already? i should stick with stock temp?

 

Everything I have seen says to stay in the factory range unless you are using nitrous, FI.

 

I'd only use one step colder with forced induction, or nitrous.

 

+1 for NGK

they also cost less than the stock platinum NGK