New 3 D Printed walnut cleaning adapter for BMW N20 N54 N55 engines. 
The design allows the use of a walnut blaster with little to no mess just attach a vacuum to the other port. 
These engines are notorious for carbon build-up. This build-up saps your engine of power and efficiency as it reduces airflow. 

Compatibility: 

Despatched within 1-2 days from the UK