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Removed the muffler

cccjrsbox
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cccjrsbox Enthusiast

cccjrsbox

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Wasn't happy with the TrailBoss exhaust note, had local shop put a flowmaster muffler in instead.  Much smaller than the BBQ grille sized OEM muffler.  Not much louder though.  Exhaust shop guy says the new chevy's are really quiet due to the cat and a resonator.  Solution was to delete the muffler all together.  Much better.  No drone at speed, but a good amount of rumble when accelerating.   

 

If I hadn't put the flowmaster on initially, shop would've charged $50 to remove the factory muffler.

 

Just fyi, seems like a good alternative to buying the OEM performance exhaust.

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Andrew F
Andrew F

Had the muffler and flapper removed on my 2020 Custom Trail Boss. Love the sound!    

bdsilverado
bdsilverado

Here's another sound clip to listen to.   

cccjrsbox
cccjrsbox

A better video below.  Figured youtube is better than the file above...    https://youtu.be/j68egCpZm_w

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Limelight Enthusiast

Limelight

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7 hours ago, cccjrsbox said:

Wasn't happy with the TrailBoss exhaust note, had local shop put a flowmaster muffler in instead.  Much smaller than the BBQ grille sized OEM muffler.  Not much louder though.  Exhaust shop guy says the new chevy's are really quiet due to the cat and a resonator.  Solution was to delete the muffler all together.  Much better.  No drone at speed, but a good amount of rumble when accelerating.   

 

If I hadn't put the flowmaster on initially, shop would've charged $50 to remove the factory muffler.

 

Just fyi, seems like a good alternative to buying the OEM performance exhaust.

You will find if you experiment with covering the resonator mesh screens it will dramatically change the sound.  My magnaflow was very quiet too. I currently have the middle resonator mesh on each side only uncovered and I think it’s the best sound so far. 

Muffler tape works great. Cut it to the shape and stick it on. So far it has stuck great and it doesn’t look like a hack job. 

cccjrsbox Enthusiast

cccjrsbox

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Here's a vid, audio kept cutting out of the iPhone recording for some reason... probably too loud for the microphones,  but managed to capture a bit of it.

IMG_0195 (2).m4v

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

That does sound good. Much like a complete aftermarket system.

I am really a fan of the new T1 dual rectangular exhaust look through the bumper.

RAM and Ford are still using round tips.

Silverado4x4 Senior Enthusiast

Silverado4x4

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Sounds good on the start up but I would think its going to make a popping and cracking sound when letting off the throttle going down the road which is going to sound like crap.

z1boss Enthusiast

z1boss

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Posted

I have an electric cutout on mine that opens before the muffler via remote control.  The sound is very deep and loud with no drone.  There is a back crackle when slowing down only if you are in 1st gear between about 16-22 mph but I love how it sounds lol.

Robwcormack Enthusiast

Robwcormack

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I've been hesitant to go this route because I've heard you lose bottom end HP and torque

Silverado4x4 Senior Enthusiast

Silverado4x4

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4 minutes ago, Robwcormack said:

I've been hesitant to go this route because I've heard you lose bottom end HP and torque

Yup. Same goes for open exhaust, headers etc which only benefits at high RPM like drag cars that spend there time at max RPM where they benefit but for a everyday driver you will loose hp and torque.

cccjrsbox Enthusiast

cccjrsbox

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24 minutes ago, Silverado4x4 said:

Yup. Same goes for open exhaust, headers etc which only benefits at high RPM like drag cars that spend there time at max RPM where they benefit but for a everyday driver you will loose hp and torque.

There's no noticeable loss of power, If anything deleting the muffler would result in a modest (+5) HP gain.   There is some back crackle at low speed deceleration though.  Wife doesn't like it, but sounds good to me!  Thinking about covering the resonator vents next to see what happens...

Thejet07 Enthusiast

Thejet07

Posted
Posted

That sounds awesome! So now that you drove it more, how’s the highway noise/drone if any? I do lots of highway driving and this is my biggest concern. I want to get rid of the flapper because the noise it makes at low speeds/idle annoys the hell out of me. Thanks for the video and your input


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z1boss Enthusiast

z1boss

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Posted
3 hours ago, Robwcormack said:

I've been hesitant to go this route because I've heard you lose bottom end HP and torque

 

2 hours ago, Silverado4x4 said:

Yup. Same goes for open exhaust, headers etc which only benefits at high RPM like drag cars that spend there time at max RPM where they benefit but for a everyday driver you will loose hp and torque.

 

I've honestly noticed 0 loss in power. Its accelerates just as good when its closed as when it's open but open sounds way better.  I have some YouTube videos posted in a different post if you want I can post them here.

cccjrsbox Enthusiast

cccjrsbox

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8 hours ago, Thejet07 said:

That sounds awesome! So now that you drove it more, how’s the highway noise/drone if any? I do lots of highway driving and this is my biggest concern. I want to get rid of the flapper because the noise it makes at low speeds/idle annoys the hell out of me. Thanks for the video and your input


Sent from my iPhone using Tapatalk

Surprisingly quiet at speed.  I've had drone with cat-backs on previous trucks and know what you mean, but no drone here.  Gets loud on mild to hard acceleration only, slow or regular driving is tame.  I'm not sure what the flapper is, but there is some back-crackle during low speed deceleration if that's one in the same.

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