Going to pull my plugs out cuz getting missfire or bogging during boost, according to full race they want you to use a 2 step colder plug which they recommend a ngk 9 cold plug, according to hks the stock plug is equvilent to a ngk 9 cold plug so im confused
http://www.brz-parts.com/50003-m45hl.html
https://www.full-race.com/articles/f...efr-turbo.html