They used my truck over at AFE for research and development on shorty headers and an off road Y-pipe. Got the truck back and made a video.

Truck is a 2014 5.3
AFE CAI
AFE Shorty Headers
AFE Off Road Y-Pipe with High Flow Cats
AFE Catback Exhaust

Turn up the speakers and enjoy

 

That sounds really nice. What about when it goes into 4cyl mode? How is the sound then?

 

It goes into 4 cylinder mode only under little to no throttle and this exhaust setup is pretty quiet until the higher rpm's so I don't notice a difference in sound.

 

sounds good! i love how the new trucks shift