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For maximum enjoyment and sound when the valve is opened on the M2 exhaust the system becomes a straight pipe to achieve peak power
and an increase in sound courtesy of the removal of the intake resonator and implementation of a semi-open design
a secondary inlet has always been desired by Dinan in order to effectively fill the volume of the enlarged air box and increased filter surface area
The lid also provides for a completely sealed air box
Dinan Free Flow Axle-Back Exhaust - 2017-2020 BMW 540i Intercoolers For maximum enjoyment and soundUtilizing the same muffler as its B58 siblings the G30 540i exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Not only is the tone improved but the additional burbles and pops that also accompany it are simply intoxicating. While on the exterior the sound may be viewed as aggressive the inside
