Hey guys, great site. I have a stock '08 stroker with 15000k on it. So far i'm not all that impressed with it. My old 6.0 ran out better then my 6.4. I've noticed everybody seems to like the spartan dpf delete/tuner kits. How easy is it to return to stock if i ever have warantee issues. Have there been any failures or problems. I live in montana and do alot of high altitude pulling. I dont want anything that will cause damage or leave me walkin. I tried to install a ppe programmer(recomended by a local shop), but it pulled a "modyfied file found" code and wouldnt down load into my truck. Not sure what that was all about, but got my $ back and am looking for something else. Any info is appreciated.