Venturi style cast alluminum carburetor spacer block sand cast aluminum 40mm thick can be drilled, tapped or welded. It is open larger on the top and bottom and is smaller in the centre.
The Aussiespeed AS0105p has tapered throttle bores that give larger volume and the venturi shape can help boost velocity.
Sand cast in a premium grade of aluminum not brittle diecast.The carb spacer can also be drilled and used as a carburetor adapter. The AS0105 can be used with Aussiespeed AS0200 phenolic 2 barrel spacers to increase the height by a further 6mm to 46mm or one on either side will give a total of 52mm.
This is drilled with pilot holes so it can be taped to 5/16 to accept studs or drilled out to fit over 5/16 carb studs.
You are buying the adapter only, it does not include gaskets or studs