Flapper valve

[Goldy]

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

[tndeerhunter125]

Yes, had mine removed and did a muffler/ flapper valve delete done.


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[Goldy]

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

[Nasty]

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]

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

[Marticus]

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

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[tndeerhunter125]

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]

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]

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]

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]

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]

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]

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]

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..........

 

 

[Ozer]

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

You can just wire it in open position