Jump to content

Muffler and flapper delete 2019 5.3 DFM

Jschnepf
 Share

Recommended Posts

Yotaak Enthusiast

Yotaak

Posted
Posted
45 minutes ago, beefin06 said:

In addition, any helicopter vibrations when DFM kicks in?

Personally I really feel as I dont have any drone, I dont know if I dont hear it because of the 33's or what. My old Silverado had tonnes of drone so maybe I'm used to it? I also rarely hear the DFM kick in, and if I do it's only at low speeds, never on the highway.

  • Replies 30
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

beefin06 Enthusiast

beefin06

Posted
Posted
2 minutes ago, Yotaak said:

Personally I really feel as I dont have any drone, I dont know if I dont hear it because of the 33's or what. My old Silverado had tonnes of drone so maybe I'm used to it? I also rarely hear the DFM kick in, and if I do it's only at low speeds, never on the highway.

Thanks for the feedback!

crazyjoefound Enthusiast

crazyjoefound

Posted
Posted
15 hours ago, Yotaak said:

 

Theres some clips for you, hopefully it all came out ok.

 

Sounds great, I'm considering taping up my mesh screens now too, are you enjoying it? Also you might as well kiss your gas mileage goodbye, I always romp it because I love the sound haha.

My gas mileage is good when I don't goose it constantly. I'm thinking about using an epoxy to cover the screens instead of the tape. I had some come off. Sounds great with it covered up.

Yotaak Enthusiast

Yotaak

Posted
Posted
2 hours ago, crazyjoefound said:

My gas mileage is good when I don't goose it constantly. I'm thinking about using an epoxy to cover the screens instead of the tape. I had some come off. Sounds great with it covered up.

Can you tell a huge difference between taped vs non taped? 

Jschnepf Enthusiast

Jschnepf

Posted
  • Author
Posted

Thank you everyone for providing input and video clips! I ended up just doing a muffler delete only and leaving the flapper in place for now. I think it sounds perfect with absolutely no drone at all at any speeds. Here's a before and after video I made of the muffler delete. 

 

 

 

beefin06 Enthusiast

beefin06

Posted
Posted
15 hours ago, Jschnepf said:

Thank you everyone for providing input and video clips! I ended up just doing a muffler delete only and leaving the flapper in place for now. I think it sounds perfect with absolutely no drone at all at any speeds. Here's a before and after video I made of the muffler delete. 

 

 

 

She sounds great! This might be exactly what I do as well. Did you leave the screens alone?

 

Any chance you're in AZ? That video looks and sounds like you are.

Jschnepf Enthusiast

Jschnepf

Posted
  • Author
Posted
Just now, beefin06 said:

She sounds great! This might be exactly what I do as well. Did you leave the screens alone?

 

 

Any chance you're in AZ? That video looks and sounds like you are.

Yes I left the screens alone. Only mod was removing the muffler. And yes I'm in AZ. San Tan Valley to be exact! 

beefin06 Enthusiast

beefin06

Posted
Posted
3 minutes ago, Jschnepf said:

Yes I left the screens alone. Only mod was removing the muffler. And yes I'm in AZ. San Tan Valley to be exact! 

Nice. Appreciate the detail, and you're video was great.

 

And hello from Scottsdale!

  • 2 weeks later...
crazyjoefound Enthusiast

crazyjoefound

Posted
Posted
On 5/9/2020 at 2:27 PM, Yotaak said:

Can you tell a huge difference between taped vs non taped? 

Yes you can. It's muffled as all hell but it works as designed when untaped. I am going to check today and see if mine has the tape still. Proper prep did not even help as in sanding the pipes and then cleaning with isopropyl alcohol. Full replacement of the pipes is a better route for total sound, but if you want a cheap way to increase sound then BOOM.

RadCopperND Enthusiast

RadCopperND

Posted
Posted (edited)

I removed my flapper and muffler only on my 2019 LTZ with 5.3. Sounds amazing and i have to say there really is no drone at highway speeds. In fact i cant even hear it from inside cab cruising down the road, unless i get on it. I left my resonators untouched but will say if you hammer it down she gets loud.

Wont let my upload my video.

Edited by RadCopperND
Jschnepf Enthusiast

Jschnepf

Posted
  • Author
Posted

I've got a neighbor that's trying to tell me that by removing my muffler, I just voided my warranty on the truck. Is that true? Only thing I did was cut the muffler out and bolt in a piece of pipe in place. Left the flapper installed. I cant imagine that by removing a muffler I'd be voiding an power-train warranty.

RadCopperND Enthusiast

RadCopperND

Posted
Posted (edited)
7 hours ago, Jschnepf said:

I've got a neighbor that's trying to tell me that by removing my muffler, I just voided my warranty on the truck. Is that true? Only thing I did was cut the muffler out and bolt in a piece of pipe in place. Left the flapper installed. I cant imagine that by removing a muffler I'd be voiding an power-train warranty.

I was told to stay from flapper down and it wont affect the warranty. You could always call your local dealership and ask them. 

Edited by RadCopperND
Brendan Burns Enthusiast

Brendan Burns

Posted
Posted

My dealership told me I could do whatever to the exhaust as long as the Cats aren't touched. I cut the muffler and flapper off and welded in a Magnaflow muffler. It has a slight drone when the AFM kicks in.

  • 3 weeks later...
trailboss_ptbo New Member

trailboss_ptbo

Posted
Posted
On 5/21/2020 at 4:33 PM, RadCopperND said:

I removed my flapper and muffler only on my 2019 LTZ with 5.3. Sounds amazing and i have to say there really is no drone at highway speeds. In fact i cant even hear it from inside cab cruising down the road, unless i get on it. I left my resonators untouched but will say if you hammer it down she gets loud.

Wont let my upload my video.

Just did the muffler delete on my 19 TB Custom with 5.3 and 6 speed, it sounds awesome too! I left the flapper in and haven't bothered covering any of the resonators. I spent a lot of time reviewing comments and watching videos, but to be honest, the muffler delete alone was exactly what I was looking for. It's quiet on highway or just cruising, but if you hammer it it's loud as hell...especially on a cold start.

  • 9 months later...
Mikev30378 New Member

Mikev30378

Posted
Posted

  Hello All,

I just purchased a 2019 and am going to replace flapper and stock muffler with a Flowmaster Delta Flow 50 series # 943052. Not looking to get to loud but let it breath a bit. Does anyone have any input on this particular setup before the oem setup comes out? Thanks in advance!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,759
    Total Members
    8,960
    Most Online
    DM22
    Newest Member
    DM22
    Joined

  • Who's Online   3 Members, 0 Anonymous, 3,083 Guests (See full list)

  • Latest Articles

  • Posts

    • dna9656
      No low range 4 x 4

      By dna9656 · Posted

      My 2015 1500 LTZ Silverado suddenly won't go into 4 x 4 low. It will go into 4 x 4 high.
    • asilverblazer
      Transmission Woes :-(

      By asilverblazer · Posted

      Yep, just a quick reference point.    My main point being I’d do a thousand other things before I’d pay 10k for a transmission.    Speaking in ignorance cause I don’t look at these trucks, what is it worth? 20k?
    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      I think users are going to want to pick their monitored parameters, which parameters they want to see first.    It should probably start with baseline at a minimum and adjust to learned, but be able to overlay baseline for comparison.   A simple severity level would be able to determine what type of alerting is appropriate or user selectable.    Why not use the OBD port though?   I think a phone connection would be a good idea, push notifications type deal.   Number 1 issue is having data is useless if you don’t know what the data should be under normal conditions. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I thought I would use your thread and add to it as I just did my first longer drive with my truck in the last couple of days. I drove from the Grande Prairie area of Alberta down to Edmonton and most of where I drove in the city was the ring road so fairly free flowing but a bit of stop and go as well in the city. Stayed the night and returned home and not too many stops along the way each way but every restart and certainly every cold start sets it back for fuel mileage. Why I say that is I see some people will cherry pick a fuel mileage leg after the vehicle had been warmed up driveline wise before hand and its a forgiving ( easy rolling drive leg for example ) and call that their fuel mileage which can give a false perception of reality. I was not heavily loaded at all but never the less the flip bak cover, rubber bed mat, various tools etc and extra jerry cans of fuel all way up to a few hundred pounds of dead weight so its not an empty truck. The cold inflation tire pressures are set more near the freezing point so once they are warmed up driving I was showing 45 front and over 40 rear and realize high inflation pressures would help a little in fuel mileage but certainly not the ride on our crap sections of highway. The weather was good so was not raining as that can really drag mileage down, in fact I had a bit of a tail wind on average driving home. Most people on here would never have driven on that freeway to visualize it but its got a fair bit of rolling type of landscape with numerous river valleys. For the most part I had it on cruise set to 62 although kicking it off if I caught it in time before it started down shifting and self braking going down the grades. Most of the more substantial grades its shifting into 7th I believe as 8th just doesn't have it. Total distance round trip was 643 miles and my overall average and I did refuel three times in all, figured out to 17.65 miles per US gallon. My best fuel mileage section refuel within all of this figured out to 18.46 and these are all hand calculated figures. I find if anything that the trucks computer can be over optimistic, sometimes its pretty close but other times its stretching it. On paper persay in theory the truck would have just about made it on fumes for that whole drive without refueling once.    Which made me think of the topic thread of the wonder if these trucks could do 20 mpg and that is a good question, certainly would have to be on an easy going flat highway, no head wind, the right temperature, not packing around a bunch of dead weight and puttering along even slower than I was I would suspect and going steady and not stopping to smell the flowers or take a piss !. It probably is possible but not without effort to attain that with the wind resistance and weight of these trucks. Of course on my drive most people are passing me if they have the power as per loaded highway tractors, never mind a lot of speedy vehicles but the speed limit is 68 and most are at or well over that. 
    • Aimatdeer
      Ac not keeping up

      By Aimatdeer · Posted

      Monday looks like a good day for the dealer to test an ac issue. Hopefully it all turns out good.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...