I have never seen a 2 peice down pipe , and as was stated it should have came with a metal tube................ 4" dia .............75-90 deg bend on said pipe for the intake ?
Edit : just checked out the BD install PDF for LBZ and they re-use the stock intake peice and V-band .
http://www.dieselperformance.com/productManual/1046210-15_-_Duramax_Supermax_Turbo_LLY_LBZ.pdf
Yeah i printed out that to help me with the install then read the directions from HTT's manual and their totally different.
i'll grab a pic of the downpipe, pretty neat actually. but no intake hose, the only silicone boot I got was some POS 1" half assed cut boot that goes where..??