Mufflers/2nd Cats/Pancake Resonator Delete - WHAT NEXT??
 

Deleted the 2nd cats and pancake resonator a few weeks back and added in x-pipes w/ 3" downpiping to the stock mufflers...no change in sound and performance remained the same.

Next, deleted the stock mufflers, added two bottle style resonators from someone who had done it before to their F10...i'm not a fan. The sound and my low end torque has definitely changed for the worse because from what I'm now told, the system recognizes it as a hole in the mufflers.

Looking for muffler options and/or high flow cats for $500-1000...ideas?