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Free Exhaust Mod!!

YQatari

By YQatari
in Engines & Drivetrain

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seth7843 Enthusiast

seth7843

Posted
Posted

I just clamped mine open. I can finally hear my exhaust when idling! I love this mod. No more sewing machine sound from a 6.2l

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iCryWheniGoPoop
iCryWheniGoPoop

Flapper valve warranty.....

iCryWheniGoPoop
iCryWheniGoPoop

Damn... I'm not sure the HP gain would be enough to counter the added weight, lol. Sure isn't going anywhere though.

Carder09
Carder09

The kinda free mod I used for my truck was a pipe cutter to remove the stock muffler. All we had at the time and then a turn down tip for $12.00 and epic exhaust lol.

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BlackHawkZ71 Enthusiast

BlackHawkZ71

Posted
Posted

I do know the 17 chevys are a lot different with that flapper mine currently has a bolt through it (i had laying around) last time i checked? Not sure if its still there??

 

I decided to leave that flapper in place when i got my flowmaster put on ($160 muffler+welding) and res delete 

 

now I wish I would have had them cut the flapper off, truck is a lot better sounding and a little louder at idle,  drone isnt bad on the highway only when i am accelerating in V4 mode. 

SirenRed16 Senior Enthusiast

SirenRed16

Posted
Posted
I do know the 17 chevys are a lot different with that flapper mine currently has a bolt through it (i had laying around) last time i checked? Not sure if its still there??
 
I decided to leave that flapper in place when i got my flowmaster put on ($160 muffler+welding) and res delete 
 
now I wish I would have had them cut the flapper off, truck is a lot better sounding and a little louder at idle,  drone isnt bad on the highway only when i am accelerating in V4 mode. 
It's still not to late you can go back and have them remove it. If they are nice enough people they might not charge you .

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BlackHawkZ71 Enthusiast

BlackHawkZ71

Posted
Posted
6 minutes ago, SirenRed16 said:

It's still not to late you can go back and have them remove it. If they are nice enough people they might not charge you .

Sent from my SAMSUNG-SM-N920A using Tapatalk
 

Would be nice. But i had this setup for a long time i think since last November? Last time i tried to get them to clamp my res on in place of flowmaster to see what I thought vs paying money to have it welded then cutoff and flowmaster re welded if I didn’t like it.. they didn’t like the idea of clamps

SirenRed16 Senior Enthusiast

SirenRed16

Posted
Posted
Would be nice. But i had this setup for a long time i think since last November? Last time i tried to get them to clamp my res on in place of flowmaster to see what I thought vs paying money to have it welded then cutoff and flowmaster re welded if I didn’t like it.. they didn’t like the idea of clamps
I see, when I got my exhaust done i removed flapper and resonator first time around. Only problem now is I want something louder.

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Hunter11 Enthusiast

Hunter11

Posted
Posted

I had the flapper valve removed on my wife's 17 the first week we got it. The sound is a deeper tone that she is happy with. If you look at that valve in the pipe even in the open position it is still a big restriction in the system. 

  • 2 weeks later...
steve76t Enthusiast

steve76t

Posted
Posted

did they change the design of the flapper on the 17s?  I've see pics of others, such as on page one of this thread, that show a square looking cap tot the spring.  The one on my 17 Sierra Denali is round & can't figure out how others have "bolted" theirs open.  Any pics of the bolt location? 

SirenRed16 Senior Enthusiast

SirenRed16

Posted
Posted
did they change the design of the flapper on the 17s?  I've see pics of others, such as on page one of this thread, that show a square looking cap tot the spring.  The one on my 17 Sierra Denali is round & can't figure out how others have "bolted" theirs open.  Any pics of the bolt location? 
Yeah I believe they changed it a bit. On the 16 it was behind the muffler and on the 17 it's in front of the muffler.

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steve76t Enthusiast

steve76t

Posted
Posted (edited)

that's what I thought.  yes, mine is in front of the muffler.  I think I could use a wire to tie it off & keep it open.  However, with it in front of the muffler it may not make much difference.  My issue is that it does rattle a little bit, especially at idle.   

Edited by steve76t
Largely Unknown Enthusiast

Largely Unknown

Posted
Posted

Mine is round as well (2017 5.3, two weeks old).  I tried a little WD40 (helped a little, changed it from a screech to a chirp).  I'm curious how you remove it, since I assume there is a piece inside the pipe?  

 

I'm always in traffic, so its constantly sounding off, but I could live with it if I had to.  

Scuba78 Enthusiast

Scuba78

Posted
Posted

Mine Chirped bad, dealer replaced the entire exhaust with only 5k miles!  i tried to get them to swap it for my choice, but no go.. I will do a mod soon. curious if anyone has tried just getting rid of the resonator.

steve76t Enthusiast

steve76t

Posted
Posted
On 11/5/2017 at 9:59 AM, FAST380 said:

So does wiring open on the 17's help? This is the first I have read about it, might have to try. 

don't know if it'll help or not.  I'm thinking trying it just to see if there's any difference.

FAST380 Enthusiast

FAST380

Posted
Posted

I did mine. 2017 All Terrain with 6.2L. It was the square style after the muffler. Made a difference, a very little difference, but might be just enough for me. For the 2 minutes it took, it isn't worth trying to discribe, just do it and see what you think. Louder on downhill deceleration. Has a little rumble it never had before. Try it. 

z0_rick New Member

z0_rick

Posted
Posted

I did mine about a week ago.  For free it's worth it. It's a little more bass. Not very noticeable.  Sounds more alive. 

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