Nocturnal155
Full Access Member
I am about to hit 25k miles on my '05 RC SRT-10 and will be upgrading the coils, plugs and wires. I have two choices for plugs from JTSVP: NGK Copper and Champion Platinum. Which brand suits the truck better given that I live in New Hampshire, where it does not get too hot, and that I currently have a drop in filter, long tube headers with high-flow cats, cat-back exhaust, and JTSVP underdrive pulley installed? I run Mobil 1 0W-40 synthetic motor oil.