Beyond the additional sound opening the semi-open intake takes the same path to success as its closed box counterpart. Improve upon the factory design by increasing flow via a larger airbox and filter element thereby improving throttle response and lessening the strain on the turbocharger for maximum efficiency. While box and filter enlargement and redesign are a major factor in ultimately producing a more potent intake, they are not the only variables in creating a more efficient design either. The devil is in the details which is where Dinan thrives. Dinan engineers focused their attention on the intake pipe itself where numerous improvements could be made. In factory configuration, the intake tube comes complete with baffling and a small Helmholtz chamber to reduce unwanted sound. As a byproduct, these features also cause a more turbulent airflow path which robs the factory system of potential power. These two specific details are diametrically opposed to our intended market's desires, so the removal of these features was paramount. Through numerous iterations, a carbon fiber intake tube was developed that eliminated flow disruptions and allowed the natural sound of an unimpeded intake tract to sing. All told this thorough methodology of design allows the Dinan carbon fiber intake for the B46/B48 engine to elicit gains of 6 HP and 6 TRQ at 5000 RPM on a completely stock vehicle.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2017-2021	BMW	230i	Base
2017-2021	BMW	230i xDrive	Base
2017-2018	BMW	330i	Base
2017-2019	BMW	330i GT xDrive	Base
2017-2019	BMW	330i xDrive	Base
2017-2020	BMW	430i	Base
2017-2020	BMW	430i Gran Coupe	Base
2017-2020	BMW	430i xDrive	Base
2017-2020	BMW	430i xDrive Gran Coupe	Base