Originally Posted by Dr Jkel
Just for everyone's knowledge if you have LT headers and hf cats, you will have increased drone with these systems.
Headers will always give a louder exhaust noise, and, as result, a louder cabin drone. That's, sadly, an unavoidable side effect. The choice of header/exhaust combo can always minimize this, and give a more specific exhaust tone too, but some cabin drone is unavoidable. If you're worried about cabin drone with a LT/Exhaust combo, I'd recommend going with a tamer system, like the Borla touring in that application.