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#1 ONLINE   Nwatson99

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Posted Jan. 01 2017 - 10:46 PM

Alright guys I have a new 4X4 truck with 425 ponies under the hood and I will say right now this is the fastest 100% stock factory 4X4 pickup I have driven yet.

I do not like loud vehicles I think they suck and should be outlawed on the highway, but can anyone tell me where I can get dual exhaust and how to get it installed without messing up my warranty?

Am I required to have it done through GM dealer even though they send me to a exhaust shop or what?

GM offers the Borla catback dual exhaust from muffler to tail pipe for my truck, but again I do not want a loud truck, but I want to take the ban off my truck's balls.

 

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#2 OFFLINE   gshayd

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Posted Jan. 01 2017 - 11:00 PM

I would say if you are worried go through the dealership. If they take it to a third party to be done then you are off the hook.




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#3 OFFLINE   devil duck

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Posted Jan. 01 2017 - 11:07 PM

All exaust systems that are legal will be "cat back" Borla makes a very fine system that are not loud at all. Yes you can hear it some under throttle but no exaust drone inside the cab. Their clam to fame is the high end Stainless steel they use and the quality of their kits.


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#4 OFFLINE   devil duck

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Posted Jan. 01 2017 - 11:10 PM

I need to retract that statement about all being legal are cat back. Some offer high performance systems that do offer cats with them. Big bucks though.


#5 ONLINE   Nwatson99

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Posted Jan. 01 2017 - 11:43 PM

I need to retract that statement about all being legal are cat back. Some offer high performance systems that do offer cats with them. Big bucks though.

Yea on sale 1K right now




#6 OFFLINE   CRE10

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Posted Jan. 02 2017 - 08:17 AM

Wonder if a cold air intake would keep your warranty. That would open it up too.




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#7 OFFLINE   Steelborn1

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Posted Jan. 02 2017 - 08:27 AM

Cold air and exhaust will not void any warrantees. Cold air system will make the engine louder under acceleration. Depending on the cat back you install will determine how loud the exhaust will be. Now, that being said, I'd only expect about 15-20 hp with the cat back and cold air installed. The factory air box and exhaust flow pretty well for your current engine. There has to be a restriction in order to make any power gains with these mods.


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#8 OFFLINE   Retcop

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Posted Jan. 02 2017 - 10:57 AM

Cold air and exhaust will not void any warrantees. Cold air system will make the engine louder under acceleration. Depending on the cat back you install will determine how loud the exhaust will be. Now, that being said, I'd only expect about 15-20 hp with the cat back and cold air installed. The factory air box and exhaust flow pretty well for your current engine. There has to be a restriction in order to make any power gains with these mods.

 

I think that is the key; finding out how much you would gain on that particular truck and that particular engine. 

If they already have things flowing pretty freely you might be spending a lot of money for very few ponies. 

 

YMMV.  (literally) 


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#9 OFFLINE   SRT8Driver

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Posted Jan. 02 2017 - 12:47 PM

Are you looking for more sound? More sound and power?

 

You have plenty of options:

 

1. A freer flowing muffler swap. Just remove your stock unit, put the aftermarket unit on and go from there. 

 

2. A freer flowing muffler with a single in/dual out configuration. This will give you the sound, remove the restriction of the stock muffler and give you a bit more flow. The dual out also gives you that dual exhaust look at the backend.

 

3. A full catback system. You can get them in a single in/single out, single in/dual out configuration.

 

Be careful about removing the resonators or getting a catback without resonators. A lot of drone can result.

 

Also, try to locate any replacement muffler under the bed, not under the cab.

 

As far as picking which one, that is the toughest thing to decide upon. But it is yours to decide as what sounds good to me may not sound good to you.

 

I have a 2014 Ram 2500 with the 6.4L HEMI, a Magnaflow 12909 muffler, a resonator delete, a programmer with a custom tune that turns off the Dodge MDS (Multiple Displacement System) which really reduces the drone.

 

Here's a short video from inside the cab, with mild acceleration and WOT takes:

 

https://www.youtube....h?v=ylsnVy5UP7Q




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#10 ONLINE   calebj06

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Posted Jan. 02 2017 - 06:40 PM

I had an 2001 f150 that was all tricked out. Super charger, MSD ignition the whole bit. It has a full Borla exhaust on it and it was really nice. Louder than stock? Yes. Loud? NO. I actually wanted something louder. And inside the truck it was not loud at all. Could barely tell it was there.

I've had other dual exhaust systems that were flow master or flow master knockoffs. They were nice, but defiantly louder than the Borla. They were what I like, but then someone like my dad loved the Borla.

Just my $.02.


#11 ONLINE   Pepper

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Posted Jan. 02 2017 - 06:49 PM

I had a Borla system on the wife's pickup that she got rid of this summer. Loud enough to remember it was a pickup, but not loud enough to be obnoxious. I'm going to start shopping for a new performance muffler for the newer pickup. It needs to be just a bit louder, remind me it's only getting 10mpg. 




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#12 ONLINE   Nwatson99

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Posted Jan. 02 2017 - 08:31 PM

Yea I would like top performance and quiet, I like a quiet vehicle, hence I was also looking at going with larger pipes for better flow as well.

However like you said SRT I have to be careful to eliminate drone since I do have the AFM on this new truck.

Also talking to local mechanic today and he told me first thing to do to the GMC is get a cold air intake, he put one on his trailblazer and instantly gained faster response and 90 miles more on a tank of gas than the stock OEM box.

 

Now question to you guys that have done this, with changing the filter more often since it is open it will get dirty faster, does the better mpg pay for the cold air intake system or does the enhanced performance make up for the initial cost?




#13 ONLINE   Pepper

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Posted Jan. 02 2017 - 08:36 PM

Yea I would like top performance and quiet, I like a quiet vehicle, hence I was also looking at going with larger pipes for better flow as well.

However like you said SRT I have to be careful to eliminate drone since I do have the AFM on this new truck.

Also talking to local mechanic today and he told me first thing to do to the GMC is get a cold air intake, he put one on his trailblazer and instantly gained faster response and 90 miles more on a tank of gas than the stock OEM box.

 

Now question to you guys that have done this, with changing the filter more often since it is open it will get dirty faster, does the better mpg pay for the cold air intake system or does the enhanced performance make up for the initial cost?

Yes. I use a K&N, and clean it every time I change the oil. Clean it, let it dry, and then spritz it down with the filter oil. 




#14 ONLINE   TomJefferson

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Posted Jan. 03 2017 - 07:10 AM

Modern engines really aren't any different than old race engines.  They're a big air pump and how much they pump limited by their narrowest restriction.  For example, building old muscle cars, you can bolt on intakes and exhausts to your hearts content but once you max out the heads, stick a a fork in it.l  Modern computerized engines, its the program. 

 

This I can tell you, you can bolt on cat backs, no problem, you touch that program and they can tell it, there goes your warranty.  There's quite the game going on between programmers and manufacturers, things like reads the code, copies it, changes it, then you can take it back before you go to the dealer.  I don't really know who's on first or second base on that anymore.  You 'd have to research it and go to the truck forums, which isn't a bad idea period when talking vehicles. 

 

What I can tell you is most performance Cat Backs complete systems are designed to max out that program.  Sound is where the decision is.  Personally I"m a Flowmaster fan.  It sounds like American muscle.  I leave Borla for the kids and their sewing machine engines.

 

Tj




#15 OFFLINE   towtruck

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Posted Jan. 03 2017 - 01:23 PM

snip.....

  Personally I"m a Flowmaster fan.  It sounds like American muscle.  

 

Tj

This^^^^^^^^^^^^^^^

 

My Old pickup ran a 3" two chamber single out and it sounded nice. My Blazer has a 3" three chamber with dual outs on a short rig.......it has a nice sound to it and if the squirrels are fed slowly it will sound like a symphony to your ears. 

 

As I get older though I do like a quiet exhaust. My diesel rig will pull like an ox and is quiet as a mouse. 




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#16 OFFLINE   Casper

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Posted Jan. 09 2017 - 02:09 PM

Did you decide on anything?

Try a GMC forum or go to the dealer and ask several mechanics, not just one.

But get specific information on your specific truck and engine. If you can sift through the posts from other truck owners on a GMC forum, you'll find what your options are. Then take that info to your dealer or mechanic and see if they match the info you got from the forum.


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#17 OFFLINE   Casper

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Posted Jan. 09 2017 - 02:11 PM

Oops. Doubled up.

Edited by Casper, Jan. 09 2017 - 02:11 PM.



#18 ONLINE   Pepper

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Posted Jan. 11 2017 - 12:24 AM

This^^^^^^^^^^^^^^^

 

My Old pickup ran a 3" two chamber single out and it sounded nice. My Blazer has a 3" three chamber with dual outs on a short rig.......it has a nice sound to it and if the squirrels are fed slowly it will sound like a symphony to your ears. 

 

As I get older though I do like a quiet exhaust. My diesel rig will pull like an ox and is quiet as a mouse. 

Your Blazer sounds amazing. I could listen to it burble along for hours. I might not even have a radio in it, as nice as it sounds. The only other exhaust system I ever had that sounded as good (to me) was the dual exhaust I had on my 83 Chev pickup. 350, with true duals, no cats, 36" long glass pack mufflers right under the cab, and dumping out behind the rear wheels. It would get loud on hard acceleration. But just running down the highway? Oh man, nothing ever sounded better. The factory radio took a dump, and I pulled it out, intending to replace it. I never did, in the 5-6 years I had that pickup. I just never needed anything to listen to other than those pipes. 




#19 OFFLINE   towtruck

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Posted Jan. 11 2017 - 01:53 AM

Your Blazer sounds amazing. I could listen to it burble along for hours. I might not even have a radio in it, as nice as it sounds. The only other exhaust system I ever had that sounded as good (to me) was the dual exhaust I had on my 83 Chev pickup. 350, with true duals, no cats, 36" long glass pack mufflers right under the cab, and dumping out behind the rear wheels. It would get loud on hard acceleration. But just running down the highway? Oh man, nothing ever sounded better. The factory radio took a dump, and I pulled it out, intending to replace it. I never did, in the 5-6 years I had that pickup. I just never needed anything to listen to other than those pipes. 

Funny, I have owned it for four years now and the radio has been broken the whole time  :laugh:







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