It is the rollover valve. You can flick it with your finger and hear something loose in it rattle. I’ve try insulating with foam and stabilizing with strong zip ties. Perhaps alittle better but I still hear it sometimes . The x wedge generates a lot of vibrations that cause it to rattle.
Last edited by Sportster; 28/07/18 09:57 PM.
2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.
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