Velocity Stacks (bellmouths) are more and more common at drag races – and there are good reasons for this trend: they optimize the flow of drawn-in air to the carburettor. With this airflow optimization, the bellmouth has benefits throughout the rev range and therefore increases performance. Can be used either completely open for maximum air passage or combined with the included mesh insert.
42mm (Stage6 Mikuni TM24)
Also works on GY6 stock CVT carburetors and many others with an intake bell diameter of 42mm