What are the best plugs and wires for the 5.3?

[swathdiver]

Hey all, I'm looking for clarification on this. ACDelco's website has 748RR listed as replacement wires for an 07 5.3 FF Tahoe. What's the difference between RR's and UU's? Also, does anyone have any input on Denso (6718161) wires? They're $25 less than ACDelco 748rr's on rockauto.

Look at the photos of the two, the RRs have 90 degree bend in them. My truck came with the 748UU but AC Delco says yours came with the 748RR, go with that.

 

[DesertRat]

Look at the photos of the two, the RRs have 90 degree bend in them. My truck came with the 748UU but AC Delco says yours came with the 748RR, go with that.

Thanks. I wasn't sure if there was something more than that, or if the UU's would be some sort of upgrade.

 

[swathdiver]

Thanks. I wasn't sure if there was something more than that, or if the UU's would be some sort of upgrade.

That I do not know. Wes might know. @Doubeleive

 

[Doubeleive]

That I do not know. Wes might know. @Doubeleive

I don't know...but I did find

Delco does sell "performance" wires(9748UU) as opposed to "Standard" wires(748UU)

I was thinking of using those VMS wires mentioned previously when the time comes around to change mine

 

[Raptor Tahoe]

Time to change mine. What's the best for the 5.3?

I have been very pleased with Edelbrock’s wires. They have a great look and performance and work well with headers.

 

[Rocket Man]

I have been very pleased with Edelbrock’s wires. They have a great look and performance and work well with headers.

View attachment 259006

Those look way too long. These are similar to the ones I bought, they’re just long enough to go from plug to coil with a tiny bit extra but not enough to let them come close to the headers. All those longer ones burned the conductors inside on a few cylinders after a few months, even with the heat shield socks on.
https://www.ebay.com/itm/254544594789

 

[Raptor Tahoe]

Those look way too long. These are similar to the ones I bought, they’re just long enough to go from plug to coil with a tiny bit extra but not enough to let them come close to the headers. All those longer ones burned the conductors inside on a few cylinders after a few months, even with the heat shield socks on.
https://www.ebay.com/itm/254544594789

Very cool, thanks for the tip. I’ll check them out.