Is this soot normal?

fuct

the rear bumper vents are fake!

i had the same stuff accumulate on my rear too after i put on res tp's. once they broke and i went back to the factory cats the problem lessened. the black stuff i see now is tire that comes off during heavy driving.

i would put those paper filter things back. they are for airflow of somesort and the paper part keeps crap out of the cabin. (if these are the same items im thinking about)


i made a thread about this awhile back. basically make sure your rear tires are aligned and yes the TP's are making it more dirty.