6.0vortech Posted May 14, 2007 Report Share Posted May 14, 2007 I installed some AC Delco Iridium spark plugs part# 41-985 that fit our trucks but are not listed for us. These are the same ones I use on my 02' Trans Am WS6 LS6 motor! These plugs are awesome the truck idles verry smooth and runs excellent also added some MSD superconductor Wires to. I also gapped these at .040. ;) Just thought I would put the part # up for others as these plugs are awesome! Quote Link to comment Share on other sites More sharing options...
cadillacbob Posted May 22, 2007 Report Share Posted May 22, 2007 I have the same plugs too! And the same results...I have over 40k on them already... Quote Link to comment Share on other sites More sharing options...
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