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Muffler Delete

2014 Sporty Shorty

By 2014 Sporty Shorty
in Engines & Drivetrain

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frogstomper Enthusiast

frogstomper

Posted
Posted

I had mine done at B&B Muffler of Crosby and 35. I might need to go back because my exhaust is rattling when i rev it it up and then let off the gas. not sure where its coming from. could it be the flapper valve rattling ?

 

 

Update : clamped the valve open rattle stopped.

How did you clamp the valve open? Is it possible to get a picture?
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theloneracer86 Enthusiast

theloneracer86

Posted
Posted

How did you clamp the valve open? Is it possible to get a picture?

I just went under the truck with a hose clamp twisted the valve open and clamped the 2 squares together to hold it in the open position.
14'SilveradoLT Enthusiast

14'SilveradoLT

Posted
Posted

I just went under the truck with a hose clamp twisted the valve open and clamped the 2 squares together to hold it in the open position.

 

Same way I did it, extremely easy and got rid of the exhaust rattle in that section. My next step is to remove that 3rd cat.

  • 1 month later...
ProModMike Enthusiast

ProModMike

Posted
Posted

Just been thinking. Thoughts on if I run the 22" Magnaflow part #12589 in place of the stock muffler, but move it forward as close as possible to the cat and leave the flap valve and resonator in place? My goal is to get some mild rumble at idle, some grunt when I stand on it, and NO drone while I'm driving people down the freeway.

chadchad1111 New Member

chadchad1111

Posted
Posted

1GT424CGXBF155294 I have a 2011 gmc sierra truck here is the VIN so you know exactly what truck I have, any problems with exhaust for these years cants find anything good on this site to tell me ..cheers

  • 2 weeks later...
Velocibiker Enthusiast

Velocibiker

Posted
Posted

Muffler deleted. Local shop did it for $50. Took about 45 minutes. The V8 actually sounds like a V8 now.

robvas Enthusiast

robvas

Posted
Posted

Just been thinking. Thoughts on if I run the 22" Magnaflow part #12589 in place of the stock muffler, but move it forward as close as possible to the cat and leave the flap valve and resonator in place? My goal is to get some mild rumble at idle, some grunt when I stand on it, and NO drone while I'm driving people down the freeway.

 

Leave the resonator but ditch the flapper. You'll be happy.

ProModMike Enthusiast

ProModMike

Posted
Posted

 

Leave the resonator but ditch the flapper. You'll be happy.

Are you running this or have you heard it? I think this could be a winning setup.

robvas Enthusiast

robvas

Posted
Posted

Are you running this or have you heard it? I think this could be a winning setup.

 

I'm running a magnaflow with the flapper removed and the resonator left in the tail pipe

ProModMike Enthusiast

ProModMike

Posted
Posted

Outstanding. And your take is it's what I'm looking for, (and like 90% of the guys on here)? Little noise but without the drone?

bass mechanic Enthusiast

bass mechanic

Posted
Posted

 

I'm running a magnaflow with the flapper removed and the resonator left in the tail pipe

i just did this on my 15 denali 6.2L sounds great! but a little more quiet than i was expecting. i may remove the resonator next and or the flapper valve.

  • 8 months later...
1300c Enthusiast

1300c

Posted
Posted

Another video. Why not.

 

 

 

Total cost was $63.90 and took about 1/2 hour

Can you hear the flapper valve rattle in person like others have mentioned? I thought I could vaguely hear it but it's hard to tell on cell phone speakers. Sounds good!

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