I have my scheduled tune on the 21st. I have everything besides my plugs. So I went looking around where I live and none of these stores carry any spark plugs besides stock heat range.
This really got me upset, so I instantly went online and ordered six of them. I think I might have grabbed a heat range too cold.
How much would 104's affect my car from 605's?
And what gap should I gap them at?
Mods will be: SD Headers, 3.4 MPS, shift kit, no cat, 180 Tstat, intake.