[cintocrunch]

Something I've suspected the answer is "no", but never seen someone definitely list part numbers. My suspicion is that at most a handful of revised part numbers may exist but mostly it was revised programming. Either way, I got the muzzler within a month of buying ours used, just not worth the risk for what I perceive as no benefit.

 

[Tahoefever]

I heard that there are two builds for the 2015 depends on your build month they started doing a cross over to the 2016 engine series. The later half of 2015 those engines would have an improved design leaning towards the 2016 series engine. Rumors I guess till we can get confirmed info