The R56 MINI Cooper S has a factory installed noisemaker to add some engine noise to the passenger compartment. 

This adds an inefficiency to the intake system that can drop the amount of available boost by 0.25-0.5 psi on stock MINIs (or greater in heavily modded cars). 

DoS has created a kit to remove the factory noisemaker and cap the former attachment location of this automotive appendix.

Hose is available in Black Silcone, Blue Silicone, or Red Silicone.

Kit includes:  1 aluminum capped Silicone Tube, 2 Stainless steel hose clamps, & Complete Instructions