hi, guys, i plann to buy a new set of ignition wire for my 87 325e what brand should i consider? "Beru" ? should i get the 8mm one instead of 7 mm? www.allbmwparts sell one kind of wire (don't know what brand it is) which said to be 100% silicon inside? is that real? any suggestion on buying one ? and where to get it cheap online? Thanks u.