Carburettor / Throttle Body STE Balancer Adaptor Number 118
This Cone adaptor suits the BK type synchrometer.
Diameter at narrow end 40mm.
Diameter ot wide end 54mm.
Length of cone section 34mm.
To help get a snug fit of the flow meter on to your carburettor’s intake opening for accurate airflow / balancing purposes.
Instructions are here