SD Performance

SD MK3 Focus RS sound suppressor


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Designed to stop the MK3 RS 'whistle' on idle or light throttle openings. The SD Performance sound suppressor is designed to cancel out this whistle. This is done by simply removing the standard part and replacing it with SD's sound suppressor.


  • Stops intake whistle
  • SD Hoses silicone hose
  • Easy DIY install
  • Machined aluminium insert