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Replaced muffler and flapper with this (short bullet muffler), too loud.


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It’s a cheap $28 bullet muffler, the offset tubing was free, and the bottom portion in pic was $20.  So after ho humming for months I pulled the trigger and deleted the muffler and flapper (I only had one).  It’s loud, too loud.  Don’t know how people are deleting the muffler and standing it.  But.. what’s weird is how the engine sounds on deceleration. It’s like it shuts off. At slow speeds it’s actually not too noisy, but when letting off the gas, the exhaust goes silent.  Then at about 5 mph while slowing down it sounds like it suddenly fires back up.  Odd and annoying.  As loud as it is I’m missing out on the deceleration rumble of a v8.  
 

 

 

 

it’s a cheap 

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Get a bigger style muffler or put in a vibrant ultra quiet resonator in place of that one. It'll still sound good and should mellow the tone out while driving.

 

GM's LS and LT engines for the last 20+ years use deceleration fuel cut off (DFCO) when coasting to a stop. It shuts off the fuel injectors and turns its self into a mini engine brake. That is why the exhaust tone changes so much.

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2 hours ago, TNTSilverado said:

Put in a Corsa Catback system. You’ll love it. I promise. 

Well it’s a bit pricey for me and this leased truck. And the corsa sport system was 3”, I didn’t really want to go smaller.  FYI, I also got an S&B intake for Christmas  I’ve yet to install.  

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2 hours ago, CamGTP said:

Get a bigger style muffler or put in a vibrant ultra quiet resonator in place of that one. It'll still sound good and should mellow the tone out while driving.

 

GM's LS and LT engines for the last 20+ years use deceleration fuel cut off (DFCO) when coasting to a stop. It shuts off the fuel injectors and turns its self into a mini engine brake. That is why the exhaust tone changes so much.

Well glad I know that now.  I’ll look into the vibrant resonators.  I also thought about a Magnaflow 14151 (14” case straight through) in addition to what I have now, or replacing all of what I have now with a 12909 22” case offset muffler, or to eliminate the inconstant sound throwing the stock stuff back on….or…

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3 hours ago, SILVER SLED said:

I’m not messing with the stock y-pipe.    

Why? If you are scared of messing stuff up take it to the exhaust shop.

 

Muffler delete is not for everyone. Just depends on how sensitive you are tbh

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10 hours ago, shakenfake said:

Why? If you are scared of messing stuff up take it to the exhaust shop.

 

Muffler delete is not for everyone. Just depends on how sensitive you are tbh

I took it to the exhaust shop to do the current work. Let’s say I don’t want to tamper with the stock y-pipe.  
 

I just don’t want this stock truck sounding like a race truck, something it isn’t.  I just wanted a little more sound.  

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1 hour ago, SILVER SLED said:

I took it to the exhaust shop to do the current work. Let’s say I don’t want to tamper with the stock y-pipe.  
 

I just don’t want this stock truck sounding like a race truck, something it isn’t.  I just wanted a little more sound.  

Then spend the money the right way and get the Corsa!!  Plain and simple!!!   👍

 

yes it’s pricey but you get what you pay for and I have not once complained about the price after initial purchase. The sound, quality, and performance make up for the initial price shocker!!!  

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3 hours ago, TNTSilverado said:

Then spend the money the right way and get the Corsa!!  Plain and simple!!!   👍

 

 

 

Quit bullying me.   Lol. 
 

I’m still pondering my choices…as I’m liking the sound a little more. 

 

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I’m also believing what GM says about the flapper existing to help with gas mileage in less than 8 cylinder mode.  This thing is sucking gas now.  No I haven’t been getting on it more, actually seemingly less because it’s so loud.  

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On 1/1/2022 at 5:50 PM, CamGTP said:

Get a bigger style muffler or put in a vibrant ultra quiet resonator in place of that one. It'll still sound good and should mellow the tone out while driving.

 

GM's LS and LT engines for the last 20+ years use deceleration fuel cut off (DFCO) when coasting to a stop. It shuts off the fuel injectors and turns its self into a mini engine brake. That is why the exhaust tone changes so much.

 

Pretty sure he's hearing it drop to one cylinder, and its programmed to fire on all eight at stop in anticipation of acceleration. Fuel cutoff actually creates a lot of exhaust noise.

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  • 2 weeks later...

Well, I now have a 3.5 in/out offset Magnaflow muffler for the truck. However I think it's gonna sit in my garage. The sound is really starting to grow on me.  Maybe I'm turning into more of a redneck, but I'm liking the sound.  So no Magnaflow for now.  

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