Posted by: hellerusa
Spark Plugs - 08/09/07 11:01 PM
I've just bought MSD Blaster Ignition Coil Packs and PRJ Performance Ignition Wires for my 2004 Grand Prix GT2. What is the best performance spark plugs to use? I've been told to use either Autolite XP606 or NGK TR55IX. Does anyone have any experience with these or other plugs?