The OEM crankcase ventilation system on the 2011-2016 6.7L Powerstroke is very bulky and obtrusive. The RDP crankcase ventilation kit replaces the factory CCV components with high quality parts and stops nasty oil vapors from being recirculated through the intake system. Kit Includes: 1-CNC machined 2-bolt vent adapter 1-CNC machined plug 1-1/2" NPT to 5/8" hose barb fitting 1-6 feet 5/8" hose 1-Hose clamp 3-Allen head bolts 5-Zip-tiesDiesel Performance