Borla part number

[BigBlueLB756]

For your ears to enjoy:

 

[89Suburban]

Yeah that’s too loud for me.

 

[Prospect62]

For your ears to enjoy:

Already saw your vids on YouTube during my "research" process. Love it.

Yeah that’s too loud for me.

I wouldn't go by his example as the new Silverado's are kind of raucous right out of the box as you can see by his "stock" cold start. My truck doesn't cold start as loud as his stock truck did, so I have to assume that my truck won't be quite as loud as his with the Borla. That said, based on my research and my years of experience messing around with cars and trucks, it seems that this Borla ProXS is about as mellow an aftermarket muffler as you're going to find. I wanted the mellowest one I could get and this is the one I landed on. Even the mellowest Flowmaster, Corsa and Magnaflow mufflers seemed louder than the Borla ProXS on most of the videos I've seen.

Once I get mine on with the resonator still in place, I will post a video. I'm hoping for a sound similar to BigBlueLB756 but just a bit quieter. ​

 

[Prospect62]

Well, I got the Borla on. It's pretty tame outside, just the right amount of sound for my taste and has a unique "booming" rumble. Cold starts sounds quite nice.

But INSIDE, it's LOUD. I failed to consider that a Suburban vs. a pickup truck is like an echo chamber. This thing is loud inside, it quiets down above 1800 RPM but as we all know the truck likes to keep RPM's around 1200 at all times and at those RPM's it just sounds like garbage. Sounds like my uncle's old square body with a parts store cherry bomb. It's not so much that it's ear-shattering loud, it's that the tone sounds cheap. And this is with the resonator still in place. I'm glad I didn't elect to remove the resonator too because it would have been way too much.

Not sure what I'm going to do...I'm starting to get more used to it but sometimes it annoys me. From outside it's pretty nice. Inside, not so much.

I may swap it for a Flowmaster 70 series. I'm more of a Flowmaster guy, always have been. This Borla was my first one and I'm not sold. Just tired of spending money on this truck. The Borla may stay for a bit.

 

[STORMIN08]

you could consider a heat wrap, hopefully containing the resonation of the metals.

 

[Prospect62]

you could consider a heat wrap, hopefully containing the resonation of the metals.

Would that help any? I don't have any experience with the heat wrap stuff. I'd be willing to give it a shot, but it seems like wrapping it wouldn't decrease the resonance.

 

[theycallmecoyote]

You'd probably have better luck with Dynamat, but you have a lot of area to cover and a lot of it isn't easy to get to.

 

[Prospect62]

You'd probably have better luck with Dynamat, but you have a lot of area to cover and a lot of it isn't easy to get to.

I was thinking that...but then I thought that a 2016 Suburban is probably already pretty well insulated and dampened. Not sure how much it would help.

Truthfully, I'd probably put a stock muffler back on before I ripped it apart to lay down Dynamat.

 

[STORMIN08]

https://www.designengineering.com/muffler-shield-kit/
https://www.designengineering.com/stainless-steel-acoustical-floor-tunnel-shield-22-x-19/

here are 2 products i have considered...one on the floor area above the muffler, the other to encapsulate, but with additional clamps to aid in stopping the resonance

 

[Prospect62]

Well I tore the Borla out and put a Walker stock replacement in, back to OEM normal and I'm happy. Just not ready to make this a loud truck yet, I enjoy the quiet ride.

In related news I have a Borla 40359 for sale. $75 shipped.