I own a challenger RT 2015 , 8 speed automatic , im confused between installing the flowmaster force II catback and the Magnaflow Competition Series Catback , what are the advantages and disadvantages of both and thank you !
It depends on the sound you want. The Magnaflow Competition Series is louder than the Flowmaster Force II catback. Check out this catback review: Magnaflow vs. Flowmaster - Which Exhaust System Sounds the Best - Exhaust Installation Videos
I run Solo Performance exhaust. love it, but that is just me, I don't like it loud all the time, just when it needs to be.