Ok I have read in the searches that if you have the nasty foul scratchy throat or watery eye symptoms from you exhaust that it is not an exhaust problem but a tuning problem..

my question is what shoudl I be looking for in my s4 n/a 5spd? with no turbo I would not expect anything but maybe bad 02 (no engine light) or maybe bad plugs (however were changed about 1500 miles ago)

anywho any help would be nice!

 

nobody has anything on this?