Muffler Shoot Out

We headed to Westech Performance Group to test out top brand exhaust mufflers to see which provided the best torque and horsepower, sound is subjective.
And the results are in, all of the top mufflers that were tested had very similar high horsepower curves and numbers. But the main differences were in the low end torque, which also has to do with the resonance tuning for sound/damping. The sound you want, might dictate the torque you get.
For TLDV; graphs of all 4 muffler tests can be seen at the end with the results.