stangGT97 New Member Dec 22, 2004 1,299 1 0 Boston area, MA Oct 4, 2006 #21 Oct 4, 2006 #21 I will say, my car seemed to run smoother with copper plugs in it. However, I yanked them out because they were not the full thread design...
I will say, my car seemed to run smoother with copper plugs in it. However, I yanked them out because they were not the full thread design...