Looking for more sound!

Pro chamber makes the most power, but has a unique sound. Off road H will give it that MUSTANG rumble at idle, but can get obnoxiously loud if you like to put the pedal to the metal, the off road X will sound raspy and higher pitch than the H. I have had all 3......prochamber was the best but the most expensive, the H is what I run now I like it alot, but is loud at highway speeds. I installed a 12" solobaric to muffle the sound :) Good luck!

IMO the MAC sounds like a cross between a X and H pipe.