Best spark plugs?

[tahoe4life]

I'm curious as to what you guys on here are using for plugs? I have no mods, etc. just stock 5.3L but still curious if you guys have seen any increased performance from certain plugs and what are they?

Thanks
2000 LT Tahoe

 

[Chevyrider619]

AC DELCO oem

 

[puckhead]

Alot of us have the NGK plugs, I have the 55,s gaped to .04

 

[Chevyrider619]

those NGK work for you?? I know they worked for my wife's old car,nissan sentra but for american car??? haven't tried them..

 

[puckhead]

Yep, I think Max, Jenna, and JK still have em. Wouldnt say I noticed much of a difference but if your going with a full engine set up every bit helps

 

[Max]

I gained a bit of top end power or maybe efficiency is the better term. Part # for the v-power plug is 2238 you can get them at any napa/advance/checker just be sure to gap them at .040.

 

[Eagle]

those NGK work for you?? I know they worked for my wife's old car, nissan sentra but for american car??? haven't tried them..

NGK *makes* the AC Delco OEM plugs.

 

[tahoe4life]

I gained a bit of top end power or maybe efficiency is the better term. Part # for the v-power plug is 2238 you can get them at any napa/advance/checker just be sure to gap them at .040.

Why are these plugs gapped at .040? Manual says stock plugs gapped at .060? Is the variation due to brand?

 

[puckhead]

GM redid their specs on them (cant remember to what) and then people figured out that .04 gives you a little more performance.

 

[TheFuzz]

I run the Delco OEM Iridium plugs. Spendy, but worth it for the lack of maintenance, IMO...changing the plugs on these trucks is a royal PITA.