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Discussion Starter #1
2012 LTX flex here,,
anyone have a preferred brand of spark plugs and coils?
RA looks like they have every kind made, but whats the right one?

Plugs
Gm says: @$7.86 ea
Part Number: 12681660
Replaces: 12622561

RA says: @$5.73 ea
ACDELCO 41109 {#12622561, 12681660} Professional; Iridium
Gap .043; Original Equipment; GAP PRE-SET AT FACTORY, DO NOT RE-GAP

Coils
GM says: @$58.99
Coil,Ign
Part Number: 12632479

RA says: @$40.79
ACDELCO D515C
Alternate/OEM Part Number(s): 12590990, 12632479, D597A


if anyone has info on plugs and coil combos that work for drving style of FAST, Faster and the Fastest LMK,,
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I have owned, driven and serviced GM vehicles for 50 years now, beginning with my first vehicle; a 1965 Chevrolet Chevrolet Malibu 2-door (and Corvettes).

I have found that OEM ACDelco parts are always high quality and work best in my vehicles, which are not modified - but are maintained very well.
 

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Discussion Starter #3
I have owned, driven and serviced GM vehicles for 50 years now, beginning with my first vehicle; a 1965 Chevrolet Chevrolet Malibu 2-door (and Corvettes).

I have found that OEM ACDelco parts are always high quality and work best in my vehicles, which are not modified - but are maintained very well.
cool cool, hear alot about ACD's being the go to for most guys typically with stock vehicles. im sure ill stick with the ACD spark plugs.
how about Coil packs?
 

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For plugs, I'd recommend AC Delco (41-109), NGK and Bosch iridiums. For coils, AC Delco (D515C), NGK and Standard Motor Products.
 

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Discussion Starter #5
For plugs, I'd recommend AC Delco (41-109), NGK and Bosch iridiums. For coils, AC Delco (D515C), NGK and Standard Motor Products.
NIIICE, i just installed the NGK iridium sparks. thanks Sheila,,
 
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