2014+ Exhaust Systems & Mufflers

[tyrich88]

3rd cat is not monitored and it is NOT HOLLOW... It has media inside and can be drilled and knocked out really easy.

 

RT

So when getting a new exhaust installed, it may be a good idea to get rid of that and just do dual pipes from the other two cats?

[SouthernSilveradoGuy85]

So when getting a new exhaust installed, it may be a good idea to get rid of that and just do dual pipes from the other two cats?

 

I don't think it will be as loud if you do that. My '98 had true duals from the factory, someone replaced the 1 big dual in/dual out factory muffler with 2 Flowmasters and later on I replaced them with 2 Flowmaster Super 40 mufflers because the other ones were in bad shape (looked like it was done when the truck was new and the truck was about 15 years old when I patched up the exhaust). So I had true duals from to back with an X pipe and it wasn't as loud as my '14 with factory single exhaust up to the muffler which is a Super 44 and is single in/dual out. I left everything in front of the muffler alone and just had them replace from the muffler on back and it's very loud and aggressive.

Edited August 3, 2015 by SouthernSilveradoGuy85

[tyrich88]

 

I don't think it will be as loud if you do that. My '98 had true duals from the factory, someone replaced the 1 big dual in/dual out factory muffler with 2 Flowmasters and later on I replaced them with 2 Flowmaster Super 40 mufflers because the other ones were in bad shape (looked like it was done when the truck was new and the truck was about 15 years old when I patched up the exhaust). So I had true duals from to back with an X pipe and it wasn't as loud as my '14 with factory single exhaust up to the muffler which is a Super 44 and is single in/dual out. I left everything in front of the muffler alone and just had them replace from the muffler on back and it's very loud and aggressive.

I was more so looking at doing dual pipes into a dual in - dual out muffler. I just figure two separate pipes would flow better than one.

But, I'm also asking because i could be wrong. Just seems like it would be better... to me.

[chuckl1218]

Couldn't figure out how, or if I could add another picture to a previous post, but here's a pic of the GM valve........certainly doesn't look as substantial as the Borla version shown in my last post.

 

REV

What happened to your pictures?

[14silverado4.3]

I am going to go pure muffler only delete with a V6, anybody have a sound clip?

[Truckin 55]

3rd cat is not monitored and it is NOT HOLLOW... It has media inside and can be drilled and knocked out really easy.

 

RT

Thanks

 

Nice welds

Thanks , shop that did exhaust on my 2012 did even better job but is closed Saturday- Monday

[ChevyTrucks_95]

This is probably a stupid question but will I see any performance gains or mpg changes from a aftermarket muffler? I want to get rid of stock muffler and flapper and replace with probably a flow master or magnaflow. I want a deep growl and rumble. Any info would help

[chuckl1218]

OK Gents, I really liked my Corsa cat-back exhaust, but had to move on. The quality, fit, finish and initial sound was very impressive and no drone at all (I turned off AFM too)...BUT...after driving it for a few months, i realized it was just too loud for me on the highway. Most of my driving was on local roads with speeds up to 60 and occasionally on one of our toll roads where the speed limit is 80 mph. And that's where the issue is...when driving speeds above ~65, it's just too loud. No drone, just loud. Below ~65, you can't hardly hear it. Went on a day trip and realized how loud it was. Taking a longer road trip with the Corsa would not be fun at all.

 

So, I ordered a GM Borla and had it installed today. Normally I would do it myself, but with temps over 100 degrees, I decided to pay a muffler shop. If you want a great buy on the Corsa, PM me or pop on over to the For Sale section to see the listing...Yes, REV, I should-a listened to ya'!

[tnchevy]

This is probably a stupid question but will I see any performance gains or mpg changes from a aftermarket muffler? I want to get rid of stock muffler and flapper and replace with probably a flow master or magnaflow. I want a deep growl and rumble. Any info would help

None at all.

[ChevyTrucks_95]

None at all.

I was just curious because right now. The truck has a delete pipe, but I feel it doesn't shift right and now the flapper valve makes noise when you hit the gas and also my gas mileage took a good hit from the stock muffler.

[iCryWheniGoPoop]

I was just curious because right now. The truck has a delete pipe, but I feel it doesn't shift right and now the flapper valve makes noise when you hit the gas and also my gas mileage took a good hit from the stock muffler.

Are you sure the flapper isn't stuck partially closed. How close to flapper is the weld on delete pipe? You might crawl under truck and manipulate the flapper by hand to verify travel. Should move very easily.

[Mike1220]

Does anyone know if I'll run into issues with cutting out the second cat? I took a real quick look and didn't notice any wires going to it so it doesn't look like its monitored. Just want a hair more sound and I'll be happy and I figure that's the easiest way

[iCryWheniGoPoop]

Does anyone know if I'll run into issues with cutting out the second cat? I took a real quick look and didn't notice any wires going to it so it doesn't look like its monitored. Just want a hair more sound and I'll be happy and I figure that's the easiest way

You will have no issues unless you live in Commifornia

[Mike1220]

You will have no issues unless you live in Commifornia

Sweet thanks for the info TDT. I'm in good ole Louisiana so no emmisions tests [emoji57]

[oldbiker]

OK Gents, I really liked my Corsa cat-back exhaust, but had to move on. The quality, fit, finish and initial sound was very impressive and no drone at all (I turned off AFM too)...BUT...after driving it for a few months, i realized it was just too loud for me on the highway. Most of my driving was on local roads with speeds up to 60 and occasionally on one of our toll roads where the speed limit is 80 mph. And that's where the issue is...when driving speeds above ~65, it's just too loud. No drone, just loud. Below ~65, you can't hardly hear it. Went on a day trip and realized how loud it was. Taking a longer road trip with the Corsa would not be fun at all.

 

So, I ordered a GM Borla and had it installed today. Normally I would do it myself, but with temps over 100 degrees, I decided to pay a muffler shop. If you want a great buy on the Corsa, PM me or pop on over to the For Sale section to see the listing...Yes, REV, I should-a listened to ya'!

Chuck,

can you give us a review on your new GM Borla exhuast? Did you get the dual side exit or dual behind the bumper?