Exhausting Question

[Desperado]

What is the best dual exhaust system I can install without a FIPK that will not negatively impact my low end torque. Possibly a catback system with one muffler and two exit pipes. Any help will be much appreciated.

 

Thanks :yingyang:

[Sierra5.3]

I put a Borla cat-back on mine. Its not the loudest because of the sound absorbing material in the muffler. But I gained low-mid when I installed it.