Free Exhaust Mod!!

[YQatari]

I wanted to hear how my truck will sound if I played with the exhaust adaptive valve, so I took a 2" clamp, turned the valve 90 degrees and clamped it really well.

It sounded nice when the exhaust was cold, took it for a short drive and noticed the tone got better when the exhaust warmed up, slightly louder, defiantly not a $1k exhaust catback sound, but hey, it's FREE!! or almost free if you don't have a 2" clamp laying around.

I'll leave the clamp for a few days, if I like the sound I might as well take that dumb valve off.

Thought about passing this tip for anyone who's considering a catback or leasing his truck, this mod is totally reversible.

 

 

On a side note, I searched all over the forum about the tailpipe diameter for the 2014 6.2L, and found that it's supposed to be the same as the 5.3L, which is about 3" or 2 7/8", but when I measured mine, it was 3.5". Did GM changed the exhaust on later builds or what?

 

 

 

[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.

[KARNUT]

Remove the muffler add a pipe, sounds good not to loud quiet at cruise. I left everything else you can always do more later. I even left the flapper for now. Cost less than a tank of gas.

 

 

Sent from my iPhone using Tapatalk

[03blackz71]

Cool idea.

 

On my 2013 6.2 my tailpipe is also 3.5"

[BlackDenali6.2]

I just did the same thing.

 

Need to find out how to post the video off my iphone.

[LTZ2014]

CSB, price on 2" clamp shipped to PA??

 

 

 

[Dj0nes]

Good thread on the muffler delete-

http://www.gm-trucks.com/forums/index.php?/topic/154538-Muffler-Delete

 

Here's a video link to mine cost me 40 bucks-

%20%20%20Sent'>http://youtu.be/mGAX4_Oi9PI%20%20%20Sent" rel="external nofollow">

 

http://youtu.be/mGAX4_Oi9PI

 

 

Sent from my iPhone using Tapatalk

Edited February 24, 2014 by Dj0nes

[YQatari]

UPDATE: I took my truck to a local exhaust shop and chopped off that valve, sounds nice! Not bad for $30.

 

 

 

 

 

 

[captras]

What is the purpose of the flapper valve? Are there any negative effects removing it or locking it open?

[YQatari]

What is the purpose of the flapper valve? Are there any negative effects removing it or locking it open?

It's there to quite the drone when the engine goes to V4, and also makes the exhaust slightly quieter but looking at how it's designed, it's very resrtrictive. The only effect of removing it is slightly louder exhaust.

[captras]

Thanks for the info

[meanjoe]

Will removing the flapper valve void the warranty?

[iCryWheniGoPoop]

Will removing the flapper valve void the warranty?

Flapper valve warranty.....

[Sooperdave]

Clamp mod performed! Nice lil bit of additional note too! Feels like a shot of nitrous. LOL

[14SLTZ71]

I clamped mine several weeks back however, I recently took it off.