Yes. Run the copper plugs. They work well in these motors and people make big power on them. Just have to be changed more than an iridium but they are a quarter the price also.
When you bought them, did you stress to the guy that its the turbo 4g63 rvr, otherwise the plug you were given sounds like the plug for a 7/91 - 11/97 Mitsubishi RVR 1800 4G93.
If you didn't give him all the correct info to go off its not their fault, if you did say for the 2l turbo 4g63 ect, then they are the wrong plugs. If you didn't provide the right info, oh well.
