[sdgoat]

Are the factory plugs in the 2005 GTOs pretty good, or should I be looking at a replacement set? Will I notice any difference? Finally, does anyone have recommendations for nice plugs? (I hear NGK all the time.)

 

[Route 66]

IMO its a waste of money.
The stock plugs are very good.
Many rave on the NGK TR55. Personally, I tried them...hated them and put the originals back in. But thats just me. :cheers

 

[ShadesOfGrey]

I had tried Platinum plugs when they came out in a Grand Prix - they sucked. Took em out & went back to stock.

ShadesOfGrey

 

[sdgoat]

Thanks for the info everyone! The factory plugs will stay!