fastsspr Posted June 6, 2009 Report Share Posted June 6, 2009 My SSS has only the volant CAI and today i installed a magnaflow muffler. It has 75k miles and i want to replace the spark plugs to have my motor in optimum conditions. Other than the factory Ac delco what you use for stock truck? and what rsults you had. Thanks guys. Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted June 6, 2009 Report Share Posted June 6, 2009 oem ac delco 41-985 iridiums Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted June 6, 2009 Report Share Posted June 6, 2009 NGK TR55IX Iridiums Quote Link to comment Share on other sites More sharing options...
fastsspr Posted June 7, 2009 Author Report Share Posted June 7, 2009 Wich one can give better performance AC delco or NGK ? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted June 7, 2009 Report Share Posted June 7, 2009 Wich one can give better performance AC delco or NGK ? they are basically the same thing....... Quote Link to comment Share on other sites More sharing options...
fastsspr Posted June 7, 2009 Author Report Share Posted June 7, 2009 Thanks so much for the info. Quote Link to comment Share on other sites More sharing options...
70chevy03ss Posted June 7, 2009 Report Share Posted June 7, 2009 (edited) Don't forget wires and 75k is not bad I changed mine at 96k and they still looked really good. Edited June 7, 2009 by Sick03ss (see edit history) Quote Link to comment Share on other sites More sharing options...
bikeman311 Posted June 7, 2009 Report Share Posted June 7, 2009 oem ac delco 41-985 iridiums Are these pre-gapped or will i need to alter the plug before installing ? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted June 7, 2009 Report Share Posted June 7, 2009 Are these pre-gapped or will i need to alter the plug before installing ? Both the NGK and AC Delco Iridium plugs come pre-gapped, sliding a feeler guage into the plug can scratch the iridium tip...... Quote Link to comment Share on other sites More sharing options...
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