GMC Performance Exhaust Experience

[battledenali]

Dose anyone have experience with the GMC performance exhaust on a Denali 6.2L?

I had a 2011 Denali with a great stock exhaust rumble, but find the 2017 to almost silent.

I want a good rumble but the V4 drone I hear about scares me.

Are there other exhaust systems you have on a 2015-2018 Denali 6.2L that sounds nice with a refined rumble and no drone?

 

[battledenali]

I scheduled my install for Friday let’s see how this goes. I hope it doesn’t suck.

 

[CMil527]

Isn't it a Borla exhaust?

 

[battledenali]

Isn't it a Borla exhaust?

It is a borla system, but from what I’m told it has the flap.

 

[CMil527]

So how did the install go? Impressions?

 

[battledenali]

So how did the install go? Impressions?

Nice low rolling rumble. At slow speeds it’s fairly loud going thru the gears, but once on the highway it quiets down. And with the radio on low volume it’s a hair louder then stock volume. But when you stomp on it the beast awakens the way the 6.2L should sound. I’ll post some clips this weekend.

 

[CHRIS CALCIANO]

Dose anyone have experience with the GMC performance exhaust on a Denali 6.2L?

I had a 2011 Denali with a great stock exhaust rumble, but find the 2017 to almost silent.

I want a good rumble but the V4 drone I hear about scares me.

Are there other exhaust systems you have on a 2015-2018 Denali 6.2L that sounds nice with a refined rumble and no drone?

A friend of mine had that “factory Borla exhaust” installed and did not like it. Personally, I installed the corsa sport and I LOVE it

 

[Agent WD-40]

Clearly too late as you already purchased this but if you liked the stock rumble on the previous generation 6.2 SUV (before exhaust got very quiet when they added AFM) you will love the GM Borla system for the new 6.2. I think volume is similar but the Borla has a smoother and deeper tone.

Yes, the GM Borla has the flapper to help with AFM noise. I didn’t notice AFM on the current 6.2 with GM Borla but I did notice the AFM when I put Cora’s on my 2012 Denali.

 

[jeffbco]

I had it installed on 2017 Yukon Denali - I think it's great. At highway speeds not too loud and no drone. The system does come with the flapper as part of the plumbing but it was never an issue for me since I disable AFM with the Range. I would have preferred a Corsa system but did not want the Sport version and Corsa doesn't offer the touring version for this car. Overall though very happy with the GM/Borla system.

 

[Jgrimberg1979]

Dose anyone have experience with the GMC performance exhaust on a Denali 6.2L?

I had a 2011 Denali with a great stock exhaust rumble, but find the 2017 to almost silent.

I want a good rumble but the V4 drone I hear about scares me.

Are there other exhaust systems you have on a 2015-2018 Denali 6.2L that sounds nice with a refined rumble and no drone?

I just had the Borla sport cat back installed on my 17’ Denali and I have to say that it is way way too loud. I have owned Borla sport systems on past cars but they did not sound nearly as loud as this one, granted the other cars were not 6.2l. I love the look of it but the sound is too much. I cringe when I am driving it. I can’t even make a phone call unless I am only cruising because it that loud. I called Borla and they are sending me the touring muffler (had to pay) to swap out but it’s going to take 2-3 weeks. I am thinking about I installling the stock exhaust in the meantime.

I think I would appreciate the loudness in my younger years but not this stage in life.

 

[GTNator]

I just had the Borla sport cat back installed on my 17’ Denali and I have to say that it is way way too loud. I have owned Borla sport systems on past cars but they did not sound nearly as loud as this one, granted the other cars were not 6.2l. I love the look of it but the sound is too much. I cringe when I am driving it. I can’t even make a phone call unless I am only cruising because it that loud. I called Borla and they are sending me the touring muffler (had to pay) to swap out but it’s going to take 2-3 weeks. I am thinking about I installling the stock exhaust in the meantime.

I think I would appreciate the loudness in my younger years but not this stage in life.

So the one you have now that is too loud, its NOT the same as the GM version correct?

 

[Jgrimberg1979]

So the one you have now that is too loud, its NOT the same as the GM version correct?

correct, but the one they are sending me(muffler) is the same one that is with the GM performance version, its the touring

 

[GTNator]

correct, but the one they are sending me(muffler) is the same one that is with the GM performance version, its the touring

Ok understood. Please post your thoughts once you get it installed, especially since you’re not a fan of super loud exhausts, same as me.


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[Jgrimberg1979]

Ok understood. Please post your thoughts once you get it installed, especially since you’re not a fan of super loud exhausts, same as me.


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I received the Borla touring exhaust this afternoon and removed the Borla s and installed the new exhaust. It is like night and day. For starters the muffler on the touring exhaust is significantly heavier than the sport, which surprised me as I was expecting the same size and weight muffler as the touring. As far as the sound as I stated is night and day. The touring is not loud at all, very quiet, a little louder than stock but I like it. You can hear it more than stock when you have the pedal down. Overall I am very pleased, although I wish it was a little closer to in between regarding the sound as the sport. I definitely recommend for someone who wants the look and a little better performance but doesn’t want a loud exhaust .

 

[GTNator]

I received the Borla touring exhaust this afternoon and removed the Borla s and installed the new exhaust. It is like night and day. For starters the muffler on the touring exhaust is significantly heavier than the sport, which surprised me as I was expecting the same size and weight muffler as the touring. As far as the sound as I stated is night and day. The touring is not loud at all, very quiet, a little louder than stock but I like it. You can hear it more than stock when you have the pedal down. Overall I am very pleased, although I wish it was a little closer to in between regarding the sound as the sport. I definitely recommend for someone who wants the look and a little better performance but doesn’t want a loud exhaust .

Thanks for the update. How is the sound on the highway? If you’re just cruising can you hear it? Or is the cabin still whisper quiet until you hit the pedal hard?



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[Jgrimberg1979]

Havent hit the highway yet but when i do i will update.

 

[Texnjpr]

Following this. Sounds like the GM Performance one might be the best compromise for my needs.

 

[GTNator]

Havent hit the highway yet but when i do i will update.

Any updates?


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[Vinvin7716]

I have the touring..if you still have the sport muffler I’d take it off your hands as it’s too quiet for my taste. There’s virtually no highway drone.

 

[robphelan]

hey guys.. where's the best place to look to buy the touring?