[mr_lab_rat]

Update: no CEL but the car behaves strange. Traction control kept interfering while going 60mph in 6th gear while the road wasn't too wet.

Edit: false alarm, the wheel spin is from my winter tire set, nothing to do with the exhaust. Sure, I expected a bit less traction going from 265 to 245 but holy crap, I'm lighting the rears up in 6th gear!