Velocity stack for Dellorto PHBL and VHST carburetors. Threads directly onto the air filter mount of the carb. 38mm ID.
28mm VHST BS Dellorto carburetor. This carb uses the larger 6mm dellorto jets and has a slightly larger 6mm fuel inlet. This is a super moped race carb originally found on Derbi Senda & GPR, Aprilia shifty fifty's with Minarelli AM6 engines.