Turbo Piping Kit CCV PCV Reroute Kit For 2004-2010 GMC Chevrolet 6.6L Duramax Diesel GenericVents crankcase blow by decreasing oil deposits in the engineNo boot soak, intake gumming, etc. increases the longevity of partsEliminates the need for the crankcase box on the top of the engine frees up room for more activities under the hoodVenturi style design eliminates the need for restrictive bafflesVirtually no oil loss no need to worry about puddles under your truckStreamline routing with no angles provides better pressure flow & no oil