2014+ Exhaust Systems & Mufflers

Trwtow · May 13, 2014

does anyone have the gmpp exhaust on there truck that dealership installs I see its even an option when u build the truck on Chevrolets website

2014MallCrawler · May 14, 2014

R u talking about the LPO exhaust that is made by borla? "Gm factory aftermarket" sounds great $1300 great... No

smpldezine · May 15, 2014

Just installed the aFe catback on my truck.. the install was very simple and the quality is great! Only thing I don't like is the "diesel" exhaust tip that comes with the system. The catback is 3" stainless and then where the tip clamps on it buldges to 3.5" and the tip outlet is 4.5" (as seen in pics). Why are these companies making these so big? Looks like it belongs on a honda. I removed the tip before I even tightened down the clamp and will be selling it ASAP. Looking for a little less dramatic tip .. otherwise the system is great and exactly the sound I was looking for without spending 2.5x as much...

14SLTZ71 · May 16, 2014

I ordered Borla Touring part # 140544. Just looking for a step above stock, not too loud. Just a deeper tone, these new trucks have almost no sound, GM was very successful at making them quiet.

Update:

This exhaust has a great sound, nice deep rumble, not too loud, however it has V4 drone along with the flutter/helicopter sound. Tune V4 out or Use the Range V8 and this is a great exhaust system. Looks real nice also, dual out the back behind each tire with polished tips. I sent it back to Borla because I want to be able to use V4 mode on long trips or whenever. I think they wanted it to run some tests on it anyway.

If you buy the GM version, it comes with the adaptive valve for V4 mode but you can't get it with dual out the back behind each tire. You have to get dual out one side or dual straight out the back.

One more thing which I found a little odd, the muffler doesn't have a drain hole so water accumulates in it. I guess you could drill a hole.

Oh, one more thing, I tried to get them to just send me the front pipe assembly from the GM version which has the adaptive valve in the pipe and they wouldn't do it. I guess GM owns the rights to that valve or something so you can't even buy the GM version of the exhaust from Borla, you have to buy it from an authorized GM dealer.

Edited May 16, 2014 by 14LTZZ71

14SLTZ71 · May 20, 2014

This is a statement I received from Corsa Performance related to their exhaust system for the 2014 Silverado:

We appreciate your interest. We have spent many hours of research and development on the new GM truck systems. We eliminated the mechanical valve after the muffler. This is how we achieve an increase in flow. At times you may notice a "flutter" type sound effect from your vehicle in V4 mode, after installing our performance exhaust. I would not call it drone. We designed our Corsa system to disguise this sound as best as possible. We do this better than any other manufacturer. But the V4 sound will always be a characteristic of your vehicle unless you have it turned off with an aftermarket "tune." But again, I would not call it drone.

2014MallCrawler · May 21, 2014

Just installed the aFe catback on my truck.. the install was very simple and the quality is great! Only thing I don't like is the "diesel" exhaust tip that comes with the system. The catback is 3" stainless and then where the tip clamps on it buldges to 3.5" and the tip outlet is 4.5" (as seen in pics). Why are these companies making these so big? Looks like it belongs on a honda. I removed the tip before I even tightened down the clamp and will be selling it ASAP. Looking for a little less dramatic tip .. otherwise the system is great and exactly the sound I was looking for without spending 2.5x as much...

I love the way the exhaust tip looks. Its fitting with how exhaust systems look these days. At least its the single side, not the dual straight out the rear like the old days! What do you think of the sound now that it has broken in a bit? I LOVE mine! I've had Borla, Flowmaster, Corsa, Bassani, Magnaflow and Stainless Works catbacks on many vehicles in the past and this for sure is a contender!

Luster · May 21, 2014

I love the way the exhaust tip looks. Its fitting with how exhaust systems look these days. At least its the single side, not the dual straight out the rear like the old days!

Haha... yeah I remember back in the 70's & 80's when "duals out the back" were the latest craze! Funny thing is, a friend of mine just had his F-150 done that way! (I think it's age-related )... (Although I'm in my 60's and I'm not a fan of that look on a TRUCK! )

Edited May 22, 2014 by Luster

2014MallCrawler · May 21, 2014

:SMH: Dodge is still doing it.

Luster · May 21, 2014

:SMH: Dodge is still doing it.

Imagine that.

Edited May 21, 2014 by Luster

KARNUT · May 21, 2014

Imagine that.

Duals been around since the flat heads, ever look at the back of your Vette? I bet there are 4 sticking out back on that. Twice pipes are more common now than ever, which is fine by me.

2014MallCrawler · May 22, 2014

I agree, they've been around for ever. On certain cars like my Camaros they have a positive function. Zero 90 degree angles or Y-pipe and a true straight to back design further scavenged by the use of an H-pipe or X-Pipe. The problem I have with duals on trucks is that they come off of the manifolds over to a y pipe then down one side then hard 90's multiple times. Efficiency relies upon the reduction of bends and the efficiency of exhaust scavenging.

KARNUT · May 22, 2014

I agree, they've been around for ever. On certain cars like my Camaros they have a positive function. Zero 90 degree angles or Y-pipe and a true straight to back design further scavenged by the use of an H-pipe or X-Pipe. The problem I have with duals on trucks is that they come off of the manifolds over to a y pipe then down one side then hard 90's multiple times. Efficiency relies upon the reduction of bends and the efficiency of exhaust scavenging.

Not really, one 3or31/2 inch is enough, so the other pipe is for the pleasure of the owner. Enough flow has already been reach. When I need more flow I just run them down one side.

Edited May 22, 2014 by KARNUT

2014MallCrawler · May 22, 2014

I never said anything about the diameter. But diameter has some to do with it, then the amount of flow from the muffler also has to do with it as well.

whodatfan · May 23, 2014

So how much does it cost to get V4 tuned out? Should I just buy a tuner and do it myself with a custom tune? Pros and cons on doing this would be greatly appreciated. Obviously a pro is eliminating any V4 drone, but what else is gained/lost by tuning it out?

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Mike1220 · May 23, 2014

So how much does it cost to get V4 tuned out? Should I just buy a tuner and do it myself with a custom tune? Pros and cons on doing this would be greatly appreciated. Obviously a pro is eliminating any V4 drone, but what else is gained/lost by tuning it out?

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By tuning it out you could lower your MPG possibly. Also if the dealer sees that your truck was tuned then they can void your warranty. Sucks that they can finally tell when these trucks get tuned. I was gonna get mine done until I read that they figured out how to tell.

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