Hey everyone, i just replaced my spark plugs yesterday with some NGK V-Power (Resister Type) got them for $1.99 a piece at Kragen. It's all good. But while taking out the old ones, i found there were some small cracked kinda white and looks like it was burned or something....but it was on the treads of the old spark plugs..i wasn't sure what was it. if it's something serious or not, but if anyone know what that it, it can be a lot of help. Oh yea...it felt like it was plastic. Thanks everyone.