Single plug for 2001-2004 Duramax LB7. $ave by buying complete set of 8 listed below.

OE replacement "rail" that connects each bank of 4 plugs together on LB7 Federal emissions trucks. In corrosive climates these rails often rust off by the #8 plug leaving the other seven plugs inoperable. Sold per ea. 2 pc per engine.

Set of 8 plugs for 2001-2004 LB7 only.