Porsche 991 GT3 w/ Armytrix Cat-Back Exhaust System!

This Porsche 991 GT3 Coupe is fitted with a custom Armytrix Cat-Back exhaust system which sounds really nice when you open up the valves! The video includes the 991 GT3 doing several revs (valves closed and open) and accelerating down the street!

#Porsche #Gt3 #Armytrix