Stick to the iridiums when it comes to the spark plugs Iridium - Its actually the best plug out there period! I am positively sure a majority would agree on that. "Only for the sticker rights" - Chrispy ............yeh - but with NGK you get a better box with some awesome, detailed and pretty coloured cut away pics and theres even lots of technical jargon and specifications to make any critic feel warm and fuzzy! Jamie (lins other half)