Just got my tires rotated and snapped a pic of the underside. Is this wear/look normal? Performs normal, no issues.

Considering an upgrade to Stillen or Magnaflow, not so much for noise (but would be a cool bonus) but for better airflow.

http://www.magnaflow.com/products?partNumber=16862

https://www.stillen.com/stillen-2007....html?___SID=U

 

Looks perfectly normal, how many miles?

 

63300