I have a set of CNT resonated test pipes as my only mod, and i get this nasty black residue on the back of my nismo. im guessing the cars areodynamics are churning it up and depositing it....?no? i can wash the car and drive to dinner and bam! already a thin layer. these pics are from waiting two weeks to wash.
its not tires being eatin' up, ive had an alignment done.
anyone else? am i running stupid rich?
