Evo 8, stock turbo basic bolt on(s2 cams, buschur catless TBE, ets intercooler+piping, Megan exhaust manifold+o2 housing) currently running bpr8es gapped at .020 and having some misfire. For mysetup would bpr7es be better and what gap? I also had my bpr8es gapped at .025 and that was horrible.

 

i have same mods .i run ngk br8es gapped at .026.runs good.

 

Pulled plugs today, 3 looked normal...but one looked like it had brown residue kinda like a rust??

 

http://www.ngksparkplugs.com/techinf...q/faqread2.asp