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Exhaust

Big Mo

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I’m looking at an after market exhaust. I have always run 40 series Flowmasters but with this truck being a lot quieter, I’m thinking 10 series or straight pipe. Any thoughts out there?
 

SteelBoss6.2

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I did a Black Widow Venom250 muffler. Sounds really good but with the DFM it gets annoying. Plus I removed the dumbass flapper valve
 
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Big Mo

Big Mo

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ok thanks. I ended up putting a flowmaster 10 series on and it was still too quiet. 2 days later I took it back and had them straight pipe it. No flapper! I’m liking the sound now. Not overly aggressive either. Just right. I just went on a 4 hour trip for business and cruise control set at 80, could barely hear it in the truck.
 
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Big Mo

Big Mo

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Yes, I have the 5.3. I didn’t even cut off the resonators. Just the exhaust and flapper.
 

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SteelBoss6.2

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Looks clean man....Dfm is alot more noticeable now IMO
Here is mine:
 

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Big Mo

Big Mo

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Nice. Looks a lot like the 40 series Flowmaster. I bet it sounds legit with the 6.2. I might still go back and throw the 10 series you see in the picture back on. Right now I’m just enjoying the beast. But like I said, can really hear it in the truck itself. Chevy did a great job with sound proofing on this new model. Thanks again for sharing the info.
 

JonSnow

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I went with the AFE muffler replacement and I cut the flapper out. It just a low rumble now. Perfect for me.
 

TrailBoss

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I did the afe muffler and flapper valve delete as well. So far I really like it! DFM is annoying though lol
 

SteelBoss6.2

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Agreed on the DFM...I hate it with a passion. RANGE Technology apparently is releasing something for us this week.
 

SteelBoss6.2

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I did next day air.. only $10 more than the standard shipping lol
Your welcome. I bought two today, my buddy wanted one for his AT4. I was haunting these guys for months about getting DFM delete and was pleasantly suprised with all the additional features. Cant wait, so stoked. You know of anyone who may want my pedal commander? Probably won't need it once this things installed
 

GTDAD66

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I’m going to watch this thread and y’all let me know how this thing works out.
 

Cal91068

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New to the forum. Got my 2021 TB 6.2 10 speed about a month ago. Put 40 series with flapper delete and DFM sound was terrible. Switched to more mellow sound or Borla cat back touring with Cold Air Inductions intake and Love the low tone growl that wakes up when you hit the pedal! Also added Wesdon exhaust tips. On the DFM, The Pulsar LT gives you the option to shut off as well as 7 other options you can modify like setting speed limiter. Not certified by Holley yet for 2021 but American Trucks willing to refund me if I hit issues. Its expensive but worth the money to me to get rid of DFM! Should be here by Friday. I will let ya know how it works
 

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JONSEY’S TB

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I’ll be getting Gibson exhaust for mine, had it on my 6.2L high country and now I’ll never use another brand, have it straight piped and flapper out at the moment and Range AFM/DFM disabler. Very little drone now. And the S&B CAI helped with that majorly.
 

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