Resonators 2019 1500 Sierra

[FRWYS & GRNS]

Modified the exhaust system on 2019 Sierra 1500 Denali by removing one of "butterfly" flaps exhaust side of muffler. Sounds great but at 65 mph the noise in cab is a bit much, especially for passengers. Did not remove resonators. Wondering if removing them would quiet the interior noise? Any thoughts, Thanks!

[Black02Silverado]

1 hour ago, FRWYS & GRNS said:

Modified the exhaust system on 2019 Sierra 1500 Denali by removing one of "butterfly" flaps exhaust side of muffler. Sounds great but at 65 mph the noise in cab is a bit much, especially for passengers. Did not remove resonators. Wondering if removing them would quiet the interior noise? Any thoughts, Thanks!

Removing the resonators would increase the noise.  Did you remove the muffler as well or just the butterfly?   Removing the butterfly should not have done much other than increased the noise when you go into deactivated cylinder mode.

[FRWYS & GRNS]

Yes, I did replace the muffler with a Flomaster but the noise inside the cab was too much. The muffler shop suggested putting the stock muffler back on and remove the butterfly. What I am learning is it is referred to as exhaust drone. Learning as I go.....

[Black02Silverado]

1 minute ago, FRWYS & GRNS said:

Yes, I did replace the muffler with a Flomaster but the noise inside the cab was too much. The muffler shop suggested putting the stock muffler back on and remove the butterfly. What I am learning is it is referred to as exhaust drone. Learning as I go.....

There are several threads on here dealing with replacing the muffler and keeping from getting drone.  Most go with a different muffler than Flowmaster.  Magnaflow seems to be a popular choice.

[Nasty]

Id keep the muffler and flapper and just cut off the resonator

[FRWYS & GRNS]

Options are greatly appreciated and worth pondering. Will peruse the threads for more info.....been through approx. 100 so far

[damnthetorpedoes]

I would swap the Flowmaster for a Magnaflow. Should be a lot less drone. Do you have a 5.3 or 6.2?

[Sierra Dan]

You might want to post this in the 2019 T1 Exhaust Forum.....

or Moderator can move there.  This is the K2 section.

[Shakeydeal]

I have a Flowmaster Super 40 with absolutely NO drone in the cabin. At some point I may swap it for a Super 10 just to get a little more sound. But the Super 40 has a nice rumble, not obtrusive at all.

 

Shakey

[FRWYS & GRNS]

Thanks for the suggestions and I will go to the 2019 T1 exhaust forum.....hopefully I can get this figured out so I can get on down the road!