This is a cheap (and dirty) trick for Carter BBD owners who haven't seen the light of WEBER yet. A 90 degree elbow for 2.5" PVC, cut down on one side and siliconed to the top of the Carb, facing the firewall, is how the snorkel begins.... When I get an adater box made my snorkel will fit my Weber and I'll be driving in the Khacki submarine once again.