My 15 PP does the same thing. It really gets bad at track speeds. Like VinnAY said, it's the cats and totally normal. I wish I could remove them. Maybe Trump will make that possible. Lol!!!
Steeda H-Pipe
Steeda Axle-Back exhaust
H-Pipe deeper muscle car sound. I love the way mine sounds and get compliments every time I drive it. But... This setup does produce a little more cabin drone. It levels out at highway speeds.
I believe that was included in the Equiptment Group 401A option package.
Voice-activated Navigation System with integrated SiriusXM Traffic and Travel Link® services with 5-year subscription
I am very pleased with my Steeda SCT tuner and the Steeda 93 octane tune. It is amazing the difference in drivability with the tune. Still great for a DD.
Let the mods begin. Installed Airaid CAI and Steeda tune with SCT tuner today. Still waiting on back ordered cat back exhaust. Will install Steeda Tri-Ax race shifter when exhaust arrives.