From the factory, MK5/Mk6 use a "noise pipe" to bring engine noise into the cabin. UroTuning offers this "noise pipe" delete kit. Utilizing a 4 ply silicone cap and german hose clamp, this is the most simple solution out there. Deleting this pipe has been known to increase throttle response and reduce cabin noise. It also improves the look of your engine bay by removing the ugly factory piece running through it.