08svt Posted March 10, 2012 Report Share Posted March 10, 2012 How restrictive are the stock GT500 mufflers compared to aftermarket. I have 08 GT500 with LT Kooks headers with catted x-pipe. I have gone through a couple of sets of different mufflers and wondering if I go back to stock how much am I loosing? Link to comment Share on other sites More sharing options...
awakeinAZ Posted March 10, 2012 Report Share Posted March 10, 2012 I have a set from 07 if you want real stock ones. Link to comment Share on other sites More sharing options...
08svt Posted March 10, 2012 Author Report Share Posted March 10, 2012 I have them, just wondering how much I loose by going back stock Link to comment Share on other sites More sharing options...
428cj Posted March 10, 2012 Report Share Posted March 10, 2012 NONE You only pick up about 3 rwhp if you take all of it off from the headers 428cj Link to comment Share on other sites More sharing options...
Harry Posted March 13, 2012 Report Share Posted March 13, 2012 428cj, Have you seen or had your own vehicle dynoed to see these results? Just wondering if there may be a article out there on this subject. Thanks, Harry Link to comment Share on other sites More sharing options...
bull3441 Posted March 13, 2012 Report Share Posted March 13, 2012 Justin made over 800whp with the stock mufflers. other than being ugly and quiet, they flow. Link to comment Share on other sites More sharing options...
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