Can anyone tell me who the manufacturer of this type of carb balancer is?

carb balancer

My documentation says a company in Germany STE

see: http://vwparts.aircooled.net/Snail-Type-Syncrometer-Carb-Sync-Tool-GERMAN-SK-p/ste-sk.htm

They are brilliant!

Thanks for that - bit of an elusive company, cant seem to find any info on them?!

not the same thing but morgan carbtunes are great and best vac type ballancers i have used (link is airflow type)

i have a set from serviceing my bikes but set my throttle bodys a dream all you need is a vac point in each port or runner

you can also buy brass metric tails to fit into manifold or use plastic adapters and just plug up holes with a bolt

i can also point out with vac gauges you can see all cyl readings at the same time and will only take 15mins max to dial in on a warm engine