Anyone know what the copper plug model number would be? Before anyone chimes in that you should use double plats of iridium, I figure..it'll take me less than 1 hour to perform the work and NGK coppers go for 2 maybe 3 dollars. I enjoy working on my car and copper gives you a better spark too. This is what I've done on my infiniti for the past 2 changes, and have to say, I'm pretty happy.
2006 e90 330i | Black/Terra | 6MT | ZSP | ZPP | ZCW