2014+ Exhaust Systems & Mufflers

coder · September 9, 2014

Very true!

That would be much appreciated. Hope you like it.

Sent from my iPhone using Tapatalk

Had this installed today. Thought I'd post some clips -- sorry about the crappy video quality.

Startup:

Revs:

Acceleration:

Definitely some drone, not unbearable. Only noticeable at ~ 1500 RPMs, and definitely more noticeable at faster speeds. I love the sound though!

Edited September 9, 2014 by coder

Mike1220 · September 10, 2014

Isn't the super 10 series outlaw just short of straight piping it? I say that just because it's such a short muffler that it can't do too much to reduce the sound.

coder · September 10, 2014

Isn't the super 10 series outlaw just short of straight piping it? I say that just because it's such a short muffler that it can't do too much to reduce the sound.

Haven't heard straight pipes on this truck but I'd imagine they are a lot louder. This is pretty aggressive sounding compared to the other Flowmasters on this truck but compared to straight pipes I'd guess it's fairly mild. I can definitely easily carry on a conversation in the cab with the windows up.

Mike1220 · September 10, 2014

Haven't heard straight pipes on this truck but I'd imagine they are a lot louder. This is pretty aggressive sounding compared to the other Flowmasters on this truck but compared to straight pipes I'd guess it's fairly mild. I can definitely easily carry on a conversation in the cab with the windows up.

Very nice! I am considering setting up a non traditional dual exhaust system. Like the mild to wild systems on the corvettes.

I will likely set up an X pipe where the headers connect, then have one exit lead to an electric cut out that will either be a straight pipe system that will reconnect to the current exhaust exits or I was considering putting in a Flowmaster outlaw series that would also reconnect to the current exits.

I like my current magnaflow but sometimes, having the exhaust just a bit louder than stock just isn't enough while other times it's perfect! So I'm hoping I can get the best of both worlds with the set up I wanna do.

ToesonTheNose · September 10, 2014

I just cannot decide for the life of me which one to get Flow master, Borla, Corsa, Or Magna flow. I dont want it over powering inside the cabin especially on the highway as I have family lol. But still want it mean when I get on it. No drone inside is key.

So far the sound clips from the CORSA, Flowmaster 40 series and GM borla seem to sound pretty good. I'm just worried about the interior 4cy drone i hear some of you mention that I have never heard.

Also i am sure it has been mentioned but is it possible to remove the stock exhaust without cutting it? If so how easy is it for someone with basic knowledge

14SLTZ71 · September 10, 2014

I just cannot decide for the life of me which one to get Flow master, Borla, Corsa, Or Magna flow. I dont want it over powering inside the cabin especially on the highway as I have family lol. But still want it mean when I get on it. No drone inside is key.

So far the sound clips from the CORSA, Flowmaster 40 series and GM borla seem to sound pretty good. I'm just worried about the interior 4cy drone i hear some of you mention that I have never heard.

Also i am sure it has been mentioned but is it possible to remove the stock exhaust without cutting it? If so how easy is it for someone with basic knowledge

I would say get one of the GM Borla kits w/the valve, then you won't have to worry about whether or not you will get the V4 drone, helicopter sound, or whatever they are calling it now-a-days.

Daniel T · September 10, 2014

Yes the stock exhaust can be removed without cutting it....

I installed the GMPP Borla exhaust with the flapper and bypass pipe. Good sound when you get on it. Quiet in the cabin at cruising speeds and no V4 drone, no choppers following me

revitupfaster · September 13, 2014

I'm considering the GM Borla system for my 2014 Z71 with the 5.3. I told myself when I ordered the truck that this time I was going to stay with the "Quiet Tones" and NOT add a performance exhaust. Well it looks like that plan may be out the window, as I'm really digging the GM Borla system.

Anyway, my question is, I ordered that ridiculosly overpriced Chrome Exhaust tip from GM when I ordered the truck...........I ordered the thing partly just to deter me from going with a cat back system, by having already invested in that overpriced OEM tip, it would make me think twice before dropping any money on an exhaust system. Again my plan doesn't seem to be working, Im sort of longing for that rumble I had with my last one.

Since the tips do not come with the GM Borla system, does anyone know if the OEM Polished Exhaust tip I already have, will fit the Borla outlet pipes? Not a real big deal, but if it will, I may be able to just buy one other OEM tip, rather than having to ante up for 2 Borla tips.

I appreciate any response

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Edited September 13, 2014 by revitupfaster

Daniel T · September 14, 2014

No the GM tip will not work on the GMPP Borla

Stock tail pipe diameter 2.75"

Borla exhaust exhaust pipes are dual outlet 2.25"

revitupfaster · September 14, 2014

No the GM tip will not work on the GMPP Borla

Stock tail pipe diameter 2.75"

Borla exhaust exhaust pipes are dual outlet 2.25"

Thanks for the reply Daniel......I was hoping to maybe save a few bucks if I do end up going the GM Borla route.........anyway, buying a second OEM tip would probably have been almost as much as the two Borla's I would need.

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revitupfaster · September 14, 2014

OK......looks like I'm slowly giving in and will probably be going with the GM Borla System. Pretty pricey, compared to Flowmaster and Magnaflow, but from what I have read here, the Borla system sounds great, with low cabin noise and virtually none of that dreaded "Drone" you usually end up with in some form or another.

I had a Magnaflow system on my last truck (07 LT 4x4 Ext Cab 5.3). This truck also had the cylinder deactivation deal, and you could definetely hear the exhaust tone change when it dropped into V4 mode, but the sound to me wasn't really offensive, I wouldn't call it a drone, it just made it noticeable when the engine switched modes. Anyway, on the 2014's, with a performance exhaust system, is this V4 "drone" more of an issue than it was with the 2007 thru 2013 models?

Finally, it looks like I will have 2 choices with the GM Borla system.......twin pipes out the back, or dual pipes out the passenger side where the factory exhaust is now. I've always liked, and gone for the twin pipes out the back before, but this time, I'm sort of leaning towards the dual side exit...........what's your preference, and why???? Do you think either exit location would make any difference to the sound levels inside the cab?

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Gatorboy112 · September 14, 2014

I think dual on passenger side looks better. And all the little kids around here all run them out at a 45 angle or straight out so it's different from them.

revitupfaster · September 15, 2014

Does anyone know what Borla muffler is the one included in the GM package?

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Daniel T · September 15, 2014

Touring

revitupfaster · September 16, 2014

Well I gave in.........went over to my dealer this morning and ended up ordering the GM Borla package for my truck. He had a new truck on the lot, to which they had installed the Borla package, so I was able to get an real life preview of the system.

Upon cold startup, there is a really nice "Bark" from the pipes, which quickley softens. Even when reving the engine while in "park" there is a nice expected V8 growl from the pipes, but really nothing you wouldn't class as "music"

We went for a short ride, and the cabin noise was non-existent until under acceleration, and even then, the sound to me was exactly what a V8 should sound like. The manufacturers are so obsessed with having a "Quiet" vehicle, the have completely forgot about the folks who prefer to hear their V8 in action.

Anyway, I was very impressed, and have to say this is the ticket for anyone that is looking for something just a bit louder than stock, with a nice bite under acceleration, and a quiet cabin. The sound may be a little subdued for some that are looking for more of an aggressive tone, but for "Old Fellers" like me, it fills the bill perfectly. A little more "Pricey" than having a muffler shop build you a system, but to me, finally getting the sound I've been chasing in my last two trucks, it's well worth it.

I decided to go with the twin pipe side exit, which to me seems just a little more of a modern look. I also didn't like the fact that the Borla exhaust pipe itself, being only 2.25", looks kinda' funny when it upsizes to the 4" split rear tips. Not a real big deal but my last 2 Silverados had the split twin pipes out the back, so it's time for a change.

They will be ordering the kit today, so hopefully I'll have it installed before the end of the week. Thanks for everyones input, this thread was very helpful in making my decision

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Edited September 17, 2014 by revitupfaster