I'm just a business owner and I've had little contact with the company but there were some major failures from a quality control side. My customer ordered some icon stage 2 heads, stage 2 cam, and the Johnson lifters and "Johnson's length pushrods". Meat of the issue is the rods were sent out extremely short. A literal 0 preload on the lifters. Mind you this issue was found at the final steps of the build process.. after contacting them I was told to remove all of the studs from the center row to send back before they would fix the issue. Multi certified tech here and I say NO to that considering they've been torqued already. In the end they've accepted no liability for the issue and I had BUY new "right" rods just to hopefully not cut my own throat on this deal or wreck the customers pocket book because of failed quality controll.. I now have to redo the head gaskets thanks to kill devil's neglect. Also I requested overnight shipping on the rods to expedite the process and get the customer his 7k in parts and almost 6k in work and guess what? Kill devil dropped the ball there too... Standard shipping and I'll see them maybe next week... Forget kdd buy sinister diesel.. I've never had a problem that they weren't willing to go above and beyond to fix read more