It is time to change them. I have always ran the AC Delco plugs b/c they never fail me.

Are there more efficient spark plugs on the market for N/A motor, or these companys full of crap like throttle body spacers haha

Does MSD plug wire do anything more compared to stock or autozone plug wires?

 

I run NGK TR5's in my truck and they work great. MSD wires are about the same as stock IMO, Taylor wires seem to be rather popular though.

 

You will find that most people run NGK TR55's, they are only like $2 each.

 

NGK TR5.. cheap and they work.
get about 50k miles out of them..
or go with the expensive iridiums and get 100k out of them..

 

Get the ac delco since your truck is n/a...

 

I just put fresh Delco iridiums in the wife's Tahoe , @ 8 $ a piece they weren't cheap , but the previous set I replaced them with lasted 100k and still looked good , so I can't bitch too much.

Auto zone and other parts stores wires are junk , they seem to pull apart if you take them off once or twice , Bosch suck too IMO

Stock wires ,MSD or napa Belden wires are good . Stock ones can be had reasonable on fleabay

 

i dont mind paying $20ish dollars more for better plugs. Im thinking the AC Delco Iridium plugs

Does your guys plug wire boots touch your headers on the driver side. Mine has been touching for 25,000 miles and no signs of melting. I believe they are bosch got them from orileys a while back when I broke the stock ones during the header swap. Input on this or solution!!!

 

I like the 8.5 mm MSD plug wires versus others including Taylors. On the LS's you might have 30 ohms resistance through them versus stock/Taylors being a few hundred. You won't feel a difference over fresh stockers though.

Plugs be either Delco's or NGK's.

 

fram / autolite XP5245 is the best plugs I ran on my truck , only down side is the white insulator isnt as tough as the NGK or ac delco ,,

 

I put the E3 plugs in the Denali about 10K miles ago and had it tuned at the same time. Notice no difference plug wise but have caused no problems and they were right around $3 each. I like chance that they are saving fuel by burning more but I have bought off a infomercial before lol