Jump to content

Keep exhaust flapper or not

YukonXL04

By YukonXL04
in Modifications & Accessories

Recommended Posts

YukonXL04 Enthusiast

YukonXL04

Posted
Posted

Hey guys. Just bought a 18 Sierra 6.2, it's too quiet. I have a Borla pro-xs on my 5.3 yukon and love it. But they dont make that muffler in a 3.5".

 

So looking to put a Borla XR-1 40086 installed next week. Gonna swap mufflers and delete the resonator, and a new 4-5" tip. So my question is do I keep the flapper or not. Looks like the flapper is 3" in and 3.5 out. No tune yet. Will probably be a while before I do a tune.

 

Thanks! 

 

I have read some have a "chopper" sound, and others dont. Some have AFM disabled, others dont. Lol what's the consensus on the flapper.

Jaychevy81 Enthusiast

Jaychevy81

Posted
Posted

I removed it did a magnaflow cat back but it had the chopper in v4 so I bought a tune and turned AFM off.


Sent from my iPhone using Tapatalk

Nasty Senior Enthusiast

Nasty

Posted
Posted

If you disable afm. Delete the flapper.  If not keep the flapper

Jaychevy81 Enthusiast

Jaychevy81

Posted
Posted

I was toying with cutting the flapper off and having it welded in front of the magnaflow muffler and have the computer reset/ flashed back to factory. I’m not sure if turning AFM off messed with the trans somehow cause it shifts like shite lolol.


Sent from my iPhone using Tapatalk

YukonXL04 Enthusiast

YukonXL04

Posted
  • Author
Posted

Ok well I will keep the flapper then. Whenever I get around to doing a tune, I'll just go back and have it chopped out and weld a pipe in its place.

 

Thanks alot! Cant wait to hear this thing make some sound!

hypntyz Enthusiast

hypntyz

Posted
Posted

I have a stock 18 denali 6.2. It was too quiet for me so I got under the truck and turned the flapper open by hand and put a hose clamp around the spring and tightened it while in the open position to hold it that way. It's still not very loud but it has a little but of sound to the stock exhaust now.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,925
    Total Members
    8,960
    Most Online
    btm
    Newest Member
    btm
    Joined

  • Who's Online   4 Members, 1 Anonymous, 1,556 Guests (See full list)

  • Latest Articles

  • Posts

    • Black02Silverado
      Post your UOA, (used oil analysis) here

      By Black02Silverado · Posted

      Here's the second UOA on my 22 Wrangler with the Ecodiesel. This has 5k miles on AMSOIL Signature Series DEO 5w-40. The first one was dealer installed oil, no clue what it was, the second is what AMSOIL recommended, European FS 5w-40, Most of the Ecodiesel world is showing great results using the European MS 5w-40, I figured I would see how the DEO works. This is using an Ecoguard oil filter. It's my understanding this engine likes to shed aluminum.  We will see. So far I don't think this is too bad.    
    • revmanii
      Disable DRL's

      By revmanii · Posted

      I'm surprised nobody seems to offer a solution like the start/stop device I put in my new truck. Remembers my setting when shutdown. And while it still starts up in start/stop, it stores/evaluates what mode it was in when shut down and will change it whithin a second or 2 of startup. It'd be nice to have something like that for the DRLs.
    • btm
      Sunroof Drain Hole Entry & Exit Location (w/ Pictures)

      By btm · Posted

      2015 Sierra 1500 here. Leaks from the sunroof to front driver side and soaks carpet. How do I fix this? Thanks!
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      I will be doing that for sure, but I need to solve who has/ where I can find a bidirectional scan tool that will support OBD 1.5. I'm kicking myself because I ebay'ed a Snap On MT2500 that I didn't think I'd ever need anymore. D'oh!! I'd rather not buy another, so I'll contact a few local shops to see if they have one and how much they'd want to do the procedure. I'd rather have the ability to do it myself... I wish there was a modern tool that could do it all, but I'd have no idea what to buy.   The theory with the pulled timing is that it mimics a rich condition. The delayed spark causes incomplete burn and the O2 sensor picks up low oxygen levels. That's interpreted as a rich condition so the PCM pulls fuel and that shows up in the deeply negative fuel trims.
    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

      An ultra wealthy man had the most beautiful daughter. But, there was a problem. Everything she touched would melt in her hands. No matter what, Metal, Wood, Stone. Anything she touched would melt. She could not feed herself. Because of this, men were afraid of her. Nobody would dare marry her. Her father was despaired. What could he do to help his daughter? He consulted doctors, scientists and anybody who could solve this problem. Finally one of them said, "If your daughter touches one thing that does not melt in her hands, she will be cured." He was overjoyed and came up with a plan. The next day, he held a competition. Any man who could bring his daughter an object that would not melt in her hands would be given billions of dollars to marry her. Three extremely intelligent and handsome young men took up the challenge. The first brought a very heavy steel rod, But alas, when the she touched it, it completely melted in a matter of seconds. He sadly went away. The second brought a beautiful diamond, knowing diamonds were one of the hardest substance in the world and would not melt. But alas, once she held it in her hand, it melted. He too was sent away disappointed. So now, there was one left He was very nervous & sweating. He approached the daughter & said, “put your hand in my pants pocket and feel what is in there." She did exactly what he asked. She felt something very hard. She held it in her hand, squeezing it as hard as she could. It did not melt & remained extremely hard. Her father was overjoyed. Everybody was overjoyed. She was finally cured. Nothing never, ever melted in her hand again. They married and they both lived happily ever after, raising a wonderful family. Question: What was in the the groom’s pants pocket??? Answer below ↓ M&Ms of course! They melt in your mouth, not in your hand. What on earth were you thinking?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...