I started noticing black staining on my driveway. I found it's caused by moisture carrying black soot out of the joints at the downpipe and Y-pipe connections. I also see it coming out the drain holes in the mufflers(not pictured). I do have a tune. Any ideas what is causing moisture to do this?
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Black staining on exhaust pipe at downpipe and Y-pipe connections.
- Thread starter S3Will
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