Step Colder Plugs

[rocksteady_racer]

Does anyone run step or 2 step colder plugs in their sr20s? I was reading sport compact pro and they used them in their project wrx so I figured they might be helpful in an sr20 too? Thanks in advance.

[nrg]

step 2 colder is fine if you're over 400whp hah. i run step 1 colder on a stockish-10psi redtop.