Thanks Guys

I just was asking these questions to my mechanic yesterday and went with the Factory OEM replacement from Pontiac Dealer AC Delco Wires (Part # 12192471) and AC Delco Iridium Spark Plugs (Part # 12568387). The plugs I was told are just NGK Iridium plugs made for AC Delco. I paid $6.50 per plug and $61.00 for the Wires.

I also had to install a new Front Trans Mount as well I found out.

I would go with the OEM plugs if you can get your dealer to give you a good deal on the part cost.

For your spark plugs get Autolite copper. About $1.70 each. That'* what I run.

I use autolite iriduim but then again I'm N/A I got me plugs for $34 a set OEM delcos

Use the copper core plugs on the SC engines. Much better reliability.

I mean wires for $34 sorry

A copper core plug is better in a performance standpoint for a supercharged engine that is modified. The reason behind that is the Iridium while lasting a much longer time have a pinpoint tip. This tip of the harder iridium heats up more than a standard copper plug tip. That extra heat can cause predetonation in higher than stock applications. The down side of the copper is, you need to change them every 20-30K miles at most. Therefore you spend about the same or more over the useful life of the Iridium plug.

If I were running a stock car, Irids would be my choice due to reliability and useful lifespan. In my modded situations, I run the Autolites instead of NGK due to a bad experience with screw on NGK plug tips. Same price, no KR from loosening tips....gimme Autolites.

I still think, if Beldens were bright red instead of blue, they wouldn't be able to make 'em fast enough. And they could charge $5 more.