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Best exhaust for 6.2

Je_suis_prest

By Je_suis_prest
in Engines & Drivetrain

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Silver ice 6.2 Senior Enthusiast

Silver ice 6.2

Posted
Posted

Since my last post I have tossed the MBRP in the trash can and replaced it with a Borla ATAK with duals under the rear bumper. It sounds pretty healthy..... I am very happy with it. It's along the lines of Silver Ice's truck but I would say it's likely louder... which I am okay with. Very quiet in the truck which was quite noticeable going from the MBRP to this... for cruising it's a lot closer to stock.

 

Hmm never heard an attack up close on these trucks.. I only heard the ones on the internet.. when I finally complete my exhaust from the cat back I know for sure it will sound louder than the attack.. and yes stock headers, and all 3 stock cats..... as soon as I finish it I will update my exhaust videos.
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jl449 Enthusiast

jl449

Posted
Posted

 

As for the GM Borla Trucks & SUV's, the twin 2.25" outlets will preform just fine, think velocity!

 

GM's Borla with bypass tube & 3" flapper valve and twin 2.25's will out flow your system, I have no drone on my truck with GM Borla. Additionally you didn't mention your welds will rust, factory exhaust is aluminized steel to reduce rusting/corrosion , muffler shop just used standard mild steel on your welds its going to rust long before your factory exhaust would have.

 

until you remove the 3" flapper there was no point other than sound.

 

Correct, I have to remove the 3" flapper and replace it with 3.5" to remove the restriction. I'm going to get this done as soon as I get my SUV back from the dealer. I'm going on the 3rd 8spd transmission.. ugh...

 

As for the welds... never thought about the steel they're using. I'll ask them next time I go there. I had my 2002 tahoe exhaust done by them back in 2003 and the work they did held up to the day I sold it in 2015.
The borla does look pretty cool... 2.5" x 2 does equal 5" so no restriction there. But you are still going from 3.5 to 3.0 right? isn't that a restriction? Or does it matter? Why did OEM go with 3.5 and not 3.0? I really don't know that's why I'm asking. You mention velocity.. but still don't understand. After I remove the flapper and replace it with 3.5 tubing will the Borla still out flow my setup?

 

When I was putting my exhaust system together I wanted the best option and flow for the best price. Figured $260 was pretty good. Also Norcal SS dynoed his 16' Escalade 6.2L with the magnaflow 12909 and AFE CAI and his gain was pretty good (his results). Total cost woth CAI and muffler was about $650. But the dual exit on the Borla does look bad ass!!

 

Also after watching this

video I didn't want to go smaller tubing (I will remove the flapper!).
Badass69 Senior Enthusiast

Badass69

Posted
Posted

Hmm never heard an attack up close on these trucks.. I only heard the ones on the internet.. when I finally complete my exhaust from the cat back I know for sure it will sound louder than the attack.. and yes stock headers, and all 3 stock cats..... as soon as I finish it I will update my exhaust videos.

So your idea is a chunk of pipe... lol. If you still have all the cats and what not unless you find a sound amplifier I honestly doubt it will be louder unless you just cut it off 4 feet behind the third cat..... which sounds like a demolition derby car lol. I have ran mine open... the exhaust I have now is not any quieter just doesn't sound like such garbage as open exhaust

The MBRP muffler is really nothing but a perforated can and this exhaust surprisingly is a lot louder. Being 304 stainless and duals... it works well for what I want for now. I'm sure 2 turbochargers pushing through it should change its sound a touch.

 

Sent from my SM-G900W8 using Tapatalk

Silver ice 6.2 Senior Enthusiast

Silver ice 6.2

Posted
Posted

So your idea is a chunk of pipe... lol. If you still have all the cats and what not unless you find a sound amplifier I honestly doubt it will be louder unless you just cut it off 4 feet behind the third cat..... which sounds like a demolition derby car lol. I have ran mine open... the exhaust I have now is not any quieter just doesn't sound like such garbage as open exhaust

The MBRP muffler is really nothing but a perforated can and this exhaust surprisingly is a lot louder. Being 304 stainless and duals... it works well for what I want for now. I'm sure 2 turbochargers pushing through it should change its sound a touch.

Sent from my SM-G900W8 using Tapatalk

Lol nope.. I'm a single in single out at the moment.. going to make it single in dual out with certain tips.. Its gonna be a lot louder. But I'm not sure if it will be louder than a attack.
Badass69 Senior Enthusiast

Badass69

Posted
Posted

Doesn't matter how loud it is... as long as it sounds good lol.

 

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Silver ice 6.2 Senior Enthusiast

Silver ice 6.2

Posted
Posted

Doesn't matter how loud it is... as long as it sounds good lol.

Sent from my SM-G900W8 using Tapatalk

I agree.. 100%
camcamaro1991 Enthusiast

camcamaro1991

Posted
Posted

 

Correct, I have to remove the 3" flapper and replace it with 3.5" to remove the restriction. I'm going to get this done as soon as I get my SUV back from the dealer. I'm going on the 3rd 8spd transmission.. ugh...

 

As for the welds... never thought about the steel they're using. I'll ask them next time I go there. I had my 2002 tahoe exhaust done by them back in 2003 and the work they did held up to the day I sold it in 2015.
The borla does look pretty cool... 2.5" x 2 does equal 5" so no restriction there. But you are still going from 3.5 to 3.0 right? isn't that a restriction? Or does it matter? Why did OEM go with 3.5 and not 3.0? I really don't know that's why I'm asking. You mention velocity.. but still don't understand. After I remove the flapper and replace it with 3.5 tubing will the Borla still out flow my setup?

 

When I was putting my exhaust system together I wanted the best option and flow for the best price. Figured $260 was pretty good. Also Norcal SS dynoed his 16' Escalade 6.2L with the magnaflow 12909 and AFE CAI and his gain was pretty good (his results). Total cost woth CAI and muffler was about $650. But the dual exit on the Borla does look bad ass!!

 

Also after watching this

video I didn't want to go smaller tubing (I will remove the flapper!).

 

Well the 3 cats 2 standard & 1 CAFE are the biggest restriction at this point, 3" tubing is fine. GM even admitted that the GM Borla & recently new GM performance exhaust made by Corsa will flow better than stock, about 33% better adding 10hp to 5.3's and 7hp to 6.2's.

 

GM Borla - 3" system, bypass flapper tube w/flapper at 3", no resonator, touring muffler, Has flex tube at cat back flange (important) single in, dual out

GM Corsa - 3" system, no flapper, resonator built into muffler, appears to be the standard Corsa touring muffler. Has flex tube at cat back flange (important) single in, single out. (Bose noise cancelling system recalibration option 6.2 only)

 

I would bet the GM Corsa is what you want, also there is a note to have the Bose noise cancelling system recalibrated with the Corsa exhaust on the 6.2's ONLY

  • 2 years later...
GMCTruckster New Member

GMCTruckster

Posted
Posted
On 3/18/2016 at 12:28 AM, Silver ice 6.2 said:

This is me... not being cocky but for the 2014-up gm trucks this sounds amazing. I've since have clamped open my valve. And sound is way better. But invisible helicopter follows me

 

 

What exhaust tip (brand, model number, etc.) did install?

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