I would bet the boomy sound is coming from the sound symposer tube. One of the flaps in the intake opens when you press the pse button maybe thats why its mitigated a bit with pse off
Like your review. I'm considering the 991.2 GT3RS LONG TUBE STREET HEADER EXHAUST SYSTEM. My primary reason for considering the upgrade is to obtain a bump in hp. On track were you able to notice performance / hp improvement with the Dundon system?
What I felt was both a bit more torque on corner exit and improved top speed on straights. Of course, the sound is also very addictive. Jamie Bopp at Dundon runs specials on uses systems from time to time if you want to save a few bucks. I’m sure he has Black Friday sale too. Good luck and let me know what after you install on your car.
