couldn,t help not responding to the warranty issue .yesterday while getting my oil changed at the dealer [ford].I had the accufab elbow on the front floor of the truck service manager came over to me and said if you install that I will void your warranty I mention I wanted to put stainless 304 cat back exhaust and his response was if you even change the air filter I will void your warranty .first ford in thirty years and if this is true about fords policy .I,LL be back at chev for another duramax no wonder there in pinch.they screwed me thirty years ago and I guess things never change.
GM is even worst, I didn't have a Dura Max, it's been a few years sense a GM was in my driveway. GM wouldn't even honor their warranty on a Stock truck, in my case!! You had best get used to the fact they (MFGs) are going to get even tougher on warrantees vs. Performance Modifications!! Better yet, do like I do and wait until the Warranty expires to modify it, that way you will no for a fact, who, is responsible for any damage to your Vehicles.