EJPut Posted February 16, 2004 Report Share Posted February 16, 2004 I just purchased oem plugs for my 93 sts, is 91-450 the correct part number? The plugs I had in there were different numbers. Also, the new plugs are not "ribbed". Should they be? What is the difference. I did notice more of a point at the bottom of the porcelin on thenew ones. Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted February 16, 2004 Report Share Posted February 16, 2004 The number 41-950 is what I have here: http://www.caddyinfo.com/newplugs.htm but perhaps that's what you meant to type. The number change now and then though so if you got AC/Delco double platinum plugs that match up to your northstar you're probably good. Bruce 2016 Cadillac ATS-V gray/black Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Eldorado Bob Posted February 17, 2004 Report Share Posted February 17, 2004 i just changed my wires & plugs last week...the new ones are the AC delco 91-450's.. the ones i removed, the original plugs, were AC delco ??-929's (i can't remember the first 2 digits)...but the point is, the new plugs are correct for the car...BTW, i bought them through GM parts Direct....bob Link to comment Share on other sites More sharing options...
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