GMC Performance Exhaust Experience

[Agent WD-40]

I am astonished how my quiet my suburban is as is, stock, I dove next to it and its so quiet it reminds me of a lexus ls460 or a town car in the way its so muffled....

I am wondering if instead of spending more than 1k on the borla GM branded catback, I could simply buy the same muffler from borla and weld it in place of the large suitcase muffler currently in the truck.

Anyone has done that?

Thanks!

This is a popular option - you would have to search and see which model of Borla or Magnaflow mufflers people use. You need a 3.5" diameter pipe. A friend of mine did this on his 2018 6.2L Sierra Denali (forgot what model Magnaflow - but the one recommended by NORCAL SS). Works well and sounds good - especially for the price. Personally I think the Borla still sounds better but hard to say it sounds $700+ better (I'm also partial to the sound of Borla over Magnaflow mufflers).

 

[AZCreeker]

So anyone could recomend a weld-in Borla Touring Muffler that would work with my 5.3 suburban?

 

[GTNator]

I would say the GM Borla system is the best choice for you. It is a little bit of a deeper and smoother tone than the last gen Escalade but similar in volume. No drone and keeps the switch over to 4 cylinder mode transparent.

How loud is the GM Borla 6.2 combo on the highway? Is it noticeable when just cruising at 70MPH? Or is the cabin still whisper quiet until you hit the pedal hard?


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[Agent WD-40]

How loud is the GM Borla 6.2 combo on the highway? Is it noticeable when just cruising at 70MPH? Or is the cabin still whisper quiet until you hit the pedal hard?

As I recall, it was whisper quiet at cruise and woke up and made some noise when your foot went down. It's been a while since I've been in that car on the highway but I recall it being similar to my Corsa in that regard - and that is exactly how my Corsa behaved.

 

[Lyon]

Just did the GM Performance cat-back system on my 2019 Suburban 6.2. Cruising at 70 there’s little to no difference from the factory system. Punch it and you’ll enjoy the music.

I’m sure it’s my imagination but it feels more powerful. Probably just an overall sensory thing. Anyway, highly recommended.

 

[YukonYeti]

How loud is the GM Borla 6.2 combo on the highway? Is it noticeable when just cruising at 70MPH? Or is the cabin still whisper quiet until you hit the pedal hard?


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I just installed the GMPP cat back on my SLT 6.2 about 2 weeks ago.
As mentioned already, at highway speeds just cruising, it is almost unnoticeable. I mean that in a good way. No drone, no V4 issues. But once you get on it to pass someone, you know it's there.
City driving it's louder with a distinct deep rumble but not obnoxious.
Exactly what I was looking for. I do like the sound of the corsa, but for me, I think it might be a little too loud. Just my opinion though.

 

[Denali4181]

Thinking of installing this on my 2019 RST. Is there any HP gained by installing?

 

[jeffbco]

Thinking of installing this on my 2019 RST. Is there any HP gained by installing?

No.

 

[Denali4181]

No.

Thanks. That's a shame. A lot of money to spend for no gain in performance.

 

[Tide]

Thanks. That's a shame. A lot of money to spend for no gain in performance.

That’s why you go cheap and do a muffler swap.

Just swapped out the factory muffler on my Escalade for dynomax round body and I love it. All said and done for $130.

Highways speeds you barely notice it but around town and accelerating it has a good rumble and not overbearing at all.


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