We do have plans for our LB7 Downpipe to be completed in the future. The tricky part is the overall shape of the DP vs. the later model trucks.
As for these down pipes, 1Low speaks the truth as to their availability. He has one of the very first production pieces made, although it shouldn't have required the wrap, and has/is doing some of our beta testing for us. XDP preordered the first production pieces and should have inventory very very soon. Because of the process in which these are made they are VERY timely to manufacture and ship. We expect to be at full capacity inside of 45 days.
No one, not even us the factory, has these items "in stock" or "on the shelf" ready to roll and XDP was the first to order just so we are clear. So if you're advertising you have the item only to try and convert the item to a competing product please discountining this practice.
I hope this clears things up. We look forward to having 1Low report back to us his testing results and will coming out with some exciting Duramax items here in the VERY near future.