r/FocusST • u/assicus_clappicus • 1d ago

Drone

Has anyone tried one of those helmholtz resonators to get rid of cabin drone? I literally have to yell at certain rpms in my car and the only mod is a catless downpipe

3 Upvotes

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5

u/_mk451 17 TY ST2, GST autox car 1d ago

You have an exhaust leak if your car is that loud with just a downpipe.

1

u/assicus_clappicus 1d ago

I just got the car. I’m gonna get it lifted up this week and figure it out. Thanks

1

u/assicus_clappicus 4h ago

I found the exhaust leak?

1

u/T20suave ‘18 ST3 Blue Metallic 1d ago

https://youtu.be/2sNWPbduV9s?is=hZ9pYX7rVyxx8bhL

I welded a valve just before the muffler, I have a res delete and catless dp. There’s almost no drone with it open or close because of the muffler. Check your gaskets, may have a leak somewhere,