Flowmaster American Thunder Muffler - (817568) drone while towing

[Scott S]

I ordered a Flowmaster American Thunder Series direct fit muffler for my 2018 Sport Crew. I listened to many sound clips prior to ordering and it sounded great.

I just realized I overlooked one thing and that is towing. My wife is sensitive to droning so now I'm second guessing my decision to upgrade the exhaust. Spending a day in a droning truck while towing would get old real quick. I may have an exhaust for sale shortly lol.

Anyone towing with the Flowmaster American Thunder muffler set up - part number 817568?

https://www.holley.com/products/exhaust/exhaust_systems/flowmaster/american_thunder/parts/817568


How is the interior sound level while towing?

Thanks for any feedback or suggestions.

 

[ecbartosh]

I have it and love it. I notice no drone when towing my boat. Really can't hear it with windows up. I sometimes with I had gone with the outlaw. But nice rumble.

Sent from my LGL722DL using Tapatalk

 

[Scott S]

I have it and love it. I notice no drone when towing my boat. Really can't hear it with windows up. I sometimes with I had gone with the outlaw. But nice rumble./QUOTE]

I'm going to go for it. Worse case I'll have to swap it back.

Now I just have to wait until it gets here Friday. Maybe I'll put in my airlift while I'm under there.

 

[gdawg55]

I had a Flowmaster 50HD muffler for awhile. I had no drone when towing my enclosed utility tailer. Sounded good.

 

[Scott S]

Thanks for the replies.

 

[Jeff Payne]

The Flowmaster 50 is my all time favorite muffler. It has a deep rumble and zero drone.

I will be adding one to my '15 but I will be buying just the muffler and welding it up myself. I still can't believe the price Flowmaster charges for these kits.

 

[David Richey]

Put a resonator in front of the muffler, cuts the drone by more than half and still keep a nice sound out the back. I had to do it on my Magnaflow.

 

[Scott S]

Put a resonator in front of the muffler, cuts the drone by more than half and still keep a nice sound out the back. I had to do it on my Magnaflow.

Thanks for the tip.

 

[Scott S]

The Flowmaster 50 is my all time favorite muffler. It has a deep rumble and zero drone.

I will be adding one to my '15 but I will be buying just the muffler and welding it up myself. I still can't believe the price Flowmaster charges for these kits.

Good to hear!

It does seem pretty pricey for a muffler and 2 pipe stubs. I paid less for my Ceramic Coated Stainless Sled exhaust and the build was gorgeous. Flowmaster is more cobbled looking. Good thing you will not be able to see it under there.

 

[Firebird]

I’ve been nervous to put a muffler on my 6.4, it would be awful to listen to drone while pulling the camper.

 

[H1Chester]

I have ARH Long Tubes to a Corsa system. Absolutely ZERO drone at highway speeds. I towed a Haul trailer 800 miles this summer. No drone.

 

[dbking321]

I put this on about a week ago. It defiantly has drone but its not as bad as other exhausts I have had. Its most noticeable between 1500-2000 RPM, Towing or not.

 

[nick heilman]

I haul a 7x27 sled trailer with mine and the same muffler. No drone really, only time you get a little bit is around 16-1800 rpm's but its barley noticeable