2020 GMC AT4 5.3L Borla catback

[loud_pipes]

I’ve been going crazy deciding what exhaust to put on my 2020 AT4. Carven R, straight pipe, Gibson, Borla. Well, I ended up going with Borla. I wanted the cat back and the 304 stainless. Thrilled with the sound! I’ve got before and after video but can’t seem to attach it here?!

 

 

 

 

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[loud_pipes]

Let’s try this:

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[TrustyDusty]

Let’s try this:






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Sounds nice. Was that the day of the install?

I settled on the Flowmaster FX stainless catback on my TB 5.3L. I am not sure it was 304 stainless though. Mine also got quite a bit louder over a couple of weeks..

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[loud_pipes]

Yes. Today was the install and the video. Flowmaster is 409 stainless. If your roads get salted, be sure to oil or treat your pipes so they don’t get surface oxidation.


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[TrustyDusty]

Yes. Today was the install and the video. Flowmaster is 409 stainless. If your roads get salted, be sure to oil or treat your pipes so they don’t get surface oxidation.


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Good tip. Salt not much of a problem in Georgia tho... [emoji41]

You should shoot a message back on this thread in a couple weeks to let us know if they got louder...

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[Swiftks]

12 minutes ago, TrustyDusty said:

Good tip. Salt not much of a problem in Georgia tho...

You should shoot a message back on this thread in a couple weeks to let us know if they got louder...

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I've has the Borla S-type for a month and half now.... Hasn't got any louder with carbon build up.  Sounds about the same.