dardy Posted September 21, 2013 Report Share Posted September 21, 2013 I have a 06 Silverado 1500 Lt with the 6.0 vmax. The truck has been acting stupid and miss firing lately so I'm going to get my cats checked. The local exhaust shop says that he believes they have California emissions cats on there and says it will be around $900 to replace them if in fact they are both bad. Do I have to put the same ones back on there if I live in Delaware? Stupid question I'm sure but he says he has to. Thanks Quote Link to comment Share on other sites More sharing options...
JC03SS Posted September 21, 2013 Report Share Posted September 21, 2013 Unless u have to put them back on I'd leave them off. Quote Link to comment Share on other sites More sharing options...
BLNAWAY Posted September 23, 2013 Report Share Posted September 23, 2013 (edited) I took mine off we don't have any emission testing in the state tho, I say you don't got to pass a yearly test remove em. If you got it tuned properly Edited September 23, 2013 by BLNAWAY (see edit history) Quote Link to comment Share on other sites More sharing options...
chawkins6789 Posted September 23, 2013 Report Share Posted September 23, 2013 If you have CA emissions cats, you will have 4. 2 small precats before the main cats Sent from my Samsung Galaxy S4 using Tapatalk 4 Quote Link to comment Share on other sites More sharing options...
dardy Posted September 23, 2013 Author Report Share Posted September 23, 2013 Damn I guess I do have them then. Because I do have the 2 little ones before the main cats. Quote Link to comment Share on other sites More sharing options...
Bad Bowtie Posted September 25, 2013 Report Share Posted September 25, 2013 I wonder when the "in service date" of your 2006 Silverado Max was? You might can still get them covered un GM warranty!! I'd pay a visit to your local GM dealer with your truck's VIN# & mileage before I shelled out any cash... Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Any guesstimates on how much better it would run after removing the cats? My crew cab has 3" all the way back to the di si out super40. It doesnt have a y pipe or anything. Would removing them help a lot for performance. One more thing, should i have tuner delete them before or is it alright if i run it to his shop after removing them, sometimes it is a little late before he has the time. And will make a drastic difference in sound, i dont want it to be god awful loud, but i can handle a little louder. Quote Link to comment Share on other sites More sharing options...
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