Next question... Why are most packages offering new spark plugs? I thought the stock plugs were good for at least 15 psi. And even then...the packages are offering spark plugs with similar temp rating as stock. I get that the copper plugs run cooler even at the the same temp rating, but changing spark plugs every 3-5k miles would be pretty pretty annoying. Thoughts?
I think I've settled on a JLT, pulley and tune through Raven racing which is tuned by Lund. I just don't understand the spark plug stuff.