Replacement Exhaust

[RandyRck]

I am looking to replace my exhaust system from the cat back.   I would like a little more V8 “rumble” from my truck …. Don’t need to blow the neighbors out of bed and would still like to be able to carry on a conversation going down the Highway.

 

I have a 2021 GMC Sierra with the 5.3 L and do NOT have the factory dual rear entry.  I would appreciate input from anyone who has made this mod.

[hertge]

AFE replacement muffler and cut out the flapper.

[mafd2]

Most aftermarket duals sound like crap when it goes into 4 cylinder mode unless you disable DFM/AFM. If you ever heard a 4 cylinder with duals you know what I'm talking about. When DFM kicks in it sounds horrible and has an awful cab drone.

[TNTSierra]

Get a full Catback system from Corsa, Borla, or even Gibson. 
 

I have Corsa absolutely zero drone. It’s whisper quiet going down the highway, but mash on the gas and it awakens. Best exhaust out there in terms of sound in my opinion.  If you want your truck to sound like a bad @$$ corvette truck. It’s the one 

 

 

On my 2018 Sierra 6.2L,  I had Gibson dual sport that exited off the side of the passenger rear behind mud flap. Excellent exhaust for price. Very very little drone. It was also very quiet going down the highway. 
 

I have heard nothing but good things from Borla…They made GMs performance exhaust. There are videos on Borlas website and it sounds great! 
 

cutting off the exhaust stock muffler and putting on a straight pipe will cause it to drone. 
 

father has flowmaster  on his truck and it sounds great on start up but terrible drone down the highway. 
 

my philosophy is do it right the first time

 

good luck 

Edited February 4, 2022 by TNTSilverado

[Transient]

The only exhaust I have experience with is the GM Performance exhaust.  As TNT said, it's made by Borla.  Also packaged and sold as Borla's Touring exhaust.  Nice bark on start up, quiets down to a little rumble.  I asked the neighbors if they hear it when in their house.  They said they don't.  Going down the freeway the tires are louder (Duratracs), but when I floor it I hear it.  Wife likened it to a quiter NASCAR sound when you floor it all the to the rev limiter.

Edited February 4, 2022 by Transient

[hertge]

AFE muffler with cutout flapper and leave screens sounds as good and is less than $200.  Full catback can be 10 times the price??

[Stifler]

I went with a BORLA  Touring catback. just enough rumble and minimal drone in the cab. Cold starts are pretty badass

[AJMBLAZER]

Jones 3” in/out 24” long welded in place of the factory muffler and flapper. Nice rumble but not obnoxious. Nice roar if you stomp on it. No drone on the highway or helicopter noise when it drops cylinders. 
 

Less than $200 installed. 

[Anacortes Army Guy]

I chose the GM performance exhaust single side exit system.  The side exit performance exhaust, unlike the dual performance exhaust, is not made by Borla, and by whom the dealer couldn't say, but it's a nice system.  3" diameter 304 stainless steel, and is a deeper sounding exhaust than stock, but not overly loud.  Plus it came with a small adhesive GM Performance label that can be placed on your tailgate if you want, and that alone I'm sure is responsible for lots of extra horsepower and a much higher top-end speed.

[RandyRck]

10 hours ago, Anacortes Army Guy said:

I chose the GM performance exhaust single side exit system.  The side exit performance exhaust, unlike the dual performance exhaust, is not made by Borla, and by whom the dealer couldn't say, but it's a nice system.  3" diameter 304 stainless steel, and is a deeper sounding exhaust than stock, but not overly loud.  Plus it came with a small adhesive GM Performance label that can be placed on your tailgate if you want, and that alone I'm sure is responsible for lots of extra horsepower and a much higher top-end speed.

Well after learning about the “Performance Label” my decision is made!!

[UncleB]

On 2/3/2022 at 8:18 PM, TNTSilverado said:

I got a catback from Gibson for my Trailblazer LS 4.2L. Sounds beefy, but NOT obnoxious. That in combo with my K&N cold air intake really makes it sound 'sweet' when I punch it. Sounds real 'mean' then! 

 

Get a full Catback system from Corsa, Borla, or even Gibson. 
 

I have Corsa absolutely zero drone. It’s whisper quiet going down the highway, but mash on the gas and it awakens. Best exhaust out there in terms of sound in my opinion.  If you want your truck to sound like a bad @$$ corvette truck. It’s the one 

 

 

On my 2018 Sierra 6.2L,  I had Gibson dual sport that exited off the side of the passenger rear behind mud flap. Excellent exhaust for price. Very very little drone. It was also very quiet going down the highway. 
 

I have heard nothing but good things from Borla…They made GMs performance exhaust. There are videos on Borlas website and it sounds great! 
 

cutting off the exhaust stock muffler and putting on a straight pipe will cause it to drone. 
 

father has flowmaster  on his truck and it sounds great on start up but terrible drone down the highway. 
 

my philosophy is do it right the first time

 

 

 

 

 

On 2/3/2022 at 8:18 PM, TNTSilverado said:

good luck 

I