[Big Hurt]

On most of the foreign cars with aftermarket exhaust there is always a black residue on the rear bumper. I never had this issue with my american muscle cars. Is this a foreign car issue. Will this be an issue with the Z. Would love the imput.

Big Hurt

 

[Big Hurt]

I had to clean my pipes on my vette but never the bumper. I guess it is due to lack of care. Thanks