01SilveradoJakee

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!

stroker87

iTrader: (6)

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)

ezdaar

iTrader: (1)

Tr6, part number 4177

01SilveradoJakee

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

05black5.3

I am using E3 3.62 in my 05 5.3

stroker87

iTrader: (6)

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

Fullpower

NGK TR6,
aka # 4177

ezdaar

iTrader: (1)

Taylor wires. Msd have a history of random missfire

01SilveradoJakee

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

01SilveradoJakee

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?