Why Are New Cars' Exhaust Pipes Often Stained Black?

2016 WRX STI. Black spots on ground behind exhaust. What can cause this? Should I be worried? : r/WRX

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Black staining from exhaust. : r/Justrolledintotheshop

Fab28 Industries - Harley Davidson M8 Softail Aftermarket Exhaust – FAB28 Industries

Why Are New Cars' Exhaust Pipes Often Stained Black?

Theres black stuff on my muffler exit pipe. Is that normal? - Quora

Exhaust black stain above tips on bumber - AcuraZine - Acura Enthusiast Community

Exhaust black stain above tips on bumber - AcuraZine - Acura Enthusiast Community

Black soot on tailpipe

Why Are New Cars' Exhaust Pipes Often Stained Black?

Black staining from exhaust. : r/Justrolledintotheshop

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