2003 Mach1 Plugs and Wires
I have 48,000 miles on my 2003 Mach1 and want to install Iridium plugs. The existing stock wires appear to be in top order. Would it make sense to replace them since they should be good until the 60,000 mile mark? Will I get better performance out of the new plugs with new wires, and if so, which brand should I consider?