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Flapper valve

Goldy

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Goldy Enthusiast

Goldy

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Has anyone ever cut off there flapper valve and welded it back on an aftermarket system? 2016 silverado 1500

Goldy Enthusiast

Goldy

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So I take it you deleted it.and now have the 4cylinder drone?

Nasty Senior Enthusiast

Nasty

Posted
Posted

I didn't have the drone. It depends on the muffler and if you keep the resonator.  I now have my afm off though

Goldy Enthusiast

Goldy

Posted
  • Author
Posted

So I take it you deleted it.and now have the 4cylinder drone?

Marticus Enthusiast

Marticus

Posted
Posted

I kept mine but I did put it in front of the muffler. I believe the borla system is like that. fdbc0cbc9e93967320bd48ebcca5e356.jpg

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tndeerhunter125 Enthusiast

tndeerhunter125

Posted
Posted
So I take it you deleted it.and now have the 4cylinder drone?

Mine is tuned on hp tuners so no drone, with the 4cyl crap tuned out

 

 

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Rufasim Enthusiast

Rufasim

Posted
Posted

I don't mean to hijack the thread but can someone please tell me the meaning of this flapper valve. What is its purpose and is it needed?

SirenRed16 Senior Enthusiast

SirenRed16

Posted
Posted
I don't mean to hijack the thread but can someone please tell me the meaning of this flapper valve. What is its purpose and is it needed?
It's for when the truck goes into v4 mode. You can remove it and the truck will be fine without it. I cut mine off about 5k miles in.

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a_salazar08 Enthusiast

a_salazar08

Posted
Posted
14 hours ago, Rufasim said:

I don't mean to hijack the thread but can someone please tell me the meaning of this flapper valve. What is its purpose and is it needed?

As mentioned above, it's for active fuel management (AFM) when the truck changes into V4 Mode.

 

It's basically a little flapper valve that will open/close based on back pressure. 

TRG Enthusiast

TRG

Posted
Posted

I thought the flapper valve was only on the GM Performance (Borla Touring) model and not actually on the Non-GM Borla muffler (i.e. the version that you buy direct from Borla)?

 

I use an AFM Range to wipe out V4 mode and was going to go with the Borla vs. GM performance model as I thought the only difference between the 2 was that the GM model has the flapper and the Borla (non-GM model) does not.  The Non-Gm Borla is also cheaper.  

SirenRed16 Senior Enthusiast

SirenRed16

Posted
Posted
I thought the flapper valve was only on the GM Performance (Borla Touring) model and not actually on the Non-GM Borla muffler (i.e. the version that you buy direct from Borla)?
 
I use an AFM Range to wipe out V4 mode and was going to go with the Borla vs. GM performance model as I thought the only difference between the 2 was that the GM model has the flapper and the Borla (non-GM model) does not.  The Non-Gm Borla is also cheaper.  
When you buy directly from Borla themselves it won't come with flapper valve.

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Largely Unknown Enthusiast

Largely Unknown

Posted
Posted
On 3/7/2018 at 5:20 PM, Goldy said:

Has anyone ever cut off there flapper valve and welded it back on an aftermarket system? 2016 silverado 1500

Just curious, is it squeaking? Mine always has (annoying), however, I elected to leave it on, like Marticus did with that sweet, simple system in one of the previous posts. I also wanted to modify the exhaust, so any chop sound would be more easily heard with a louder system.  

 

FYI: The muffler/flapper valve discussions are the most highly subjective of them all.  

 

If you do take it off, please report back on your findings!

 

 

Krusty Enthusiast

Krusty

Posted
Posted
On ‎3‎/‎7‎/‎2018 at 3:40 PM, Goldy said:

So I take it you deleted it.and now have the 4cylinder drone?

See thread linked in my sig..........

 

 

Flowmaster 53553.JPG

Flowmaster OEM.JPG

Ozer Enthusiast

Ozer

Posted
Posted

If you cut it off, save it because i seen some people looking to buy them. 

You can just wire it in open position

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