What plugs have you guys been using?
 

I still have factory ac delco plugs but looking to upgrade it! Ive heard TR6 plugs are good but not really sure if i should go ahead and change them for something else!

i've used tr55's, tr6's on these LS engines they all worked dont over think it just get them swapped a new set of stock plugs even will make you happy if yours has a bunch of miles on them (unless your engine is really built)

Tr6, part number 4177

Do you guys run different wires?
Also what do you gap them at? Whatever they come to or??

I am using E3 3.62 in my 05 5.3

think it was 40 on the gap, stock wires or msd is all i ever used on my trucks and cars i've had good luck with both

NGK TR6,
aka # 4177

Taylor wires. Msd have a history of random missfire

Does it matter what color taylor wires they are? I get the different lenths. But the colors just for looks?

What do you mean they all worked?

You mean regardless tr55 or tr6 both will be a great plug for a na 91 octane silvy?