04silveradoclone07ss Posted November 7, 2006 Report Share Posted November 7, 2006 well i was looking around for headers and they have 2 options with or without egr. what is it? and a.i.r? dont know what either mean. any help would be good Quote Link to comment Share on other sites More sharing options...
misterp Posted November 7, 2006 Report Share Posted November 7, 2006 Smog crap. I'm almost positive you've got AIR injection on your truck, so whatever headers you buy will need the hookups for that plumbing. LQ9's do not have AIR and are hence exempt. Mr. P. Quote Link to comment Share on other sites More sharing options...
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