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im still learning the difference between turbo back and def back...any words of wisdom would be great
 

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Discussion Starter #5
Turbo back exhaust starts at the turbo and goes all the whole back and deletes all the emission equipment. Dpf back is exactly that, keeps everything in front of the dpf and replaces everything behind the dpf to the tail pipe.
 

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Turbo back exhaust starts at the turbo and goes all the whole back and deletes all the emission equipment. Dpf back is exactly that, keeps everything in front of the dpf and replaces everything behind the dpf to the tail pipe.
Makes sense, how does it effect the DEF system by removing the tank
 

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Discussion Starter #8
Sorry the dpf and scr
The Def injection system does not restrict performance, it only injects the def fluid into the exhaust gasses and makes it more eco friendly. The dpf and to a point the egr is what hinders performance. The dpf is just basically a filter in the exhaust that catches whatever particles it can, which puts a higher load on the engine just to expel the exhaust. The egr takes exhaust gasses and reroutes them back into the engine to be reburned. This causes a build up of soot in the intake which will restrict air flow and eventually make it harder for air to get into the engine. On these modern diesels, getting rid of any of these emission equipment will trigger a fault code and throw the vehicle into limp mode and make it undrivable. Tuning is required to be able to remove any of these. If you are looking to change your exhaust without tuning and thus voiding your warranty, you will need to look for the dpf or cat back exhaust systems.
 

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I would argue that the EGR does indeed hinder performance. The EGR on my 2004 Duramax was getting plugged up and causing the truck to have serious lag time from when you stepped on the pedal and to when it actually started moving...a new one was $600 but obviously, it would no doubt get plugged up again in the future. A full delete kit and tuning from DuramaxTuner was about $600-650 I think so I went that route. What a world of difference (I had a down-pipe back straight pipe exhaust already before doing the delete). No hesitation or lag, it just went.

On another note though, I see that AFE has both Turbo Back and Down-Pipe back exhausts. I haven't got to see or mess with a new diesel Canyon and so I have no idea where things are at under there. Such as, is the muffler and DPF all one piece or is perhaps the DPF inside the down-pipe? On a 2004 Duramax, you could change out the down-pipe for a new less restrictive one, but it was a nightmare to replace, so I went with a down-pipe back exhaust. Perhaps the same is true with the 2.8 Duramax? Just have to see if there is any downside to keeping the stock down-pipe and if it would be all that difficult to change out the stock one or just go with a down-pipe back exhaust with no muffler.
 

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Discussion Starter #10
I would argue that the EGR does indeed hinder performance. The EGR on my 2004 Duramax was getting plugged up and causing the truck to have serious lag time from when you stepped on the pedal and to when it actually started moving...a new one was $600 but obviously, it would no doubt get plugged up again in the future. A full delete kit and tuning from DuramaxTuner was about $600-650 I think so I went that route. What a world of difference (I had a down-pipe back straight pipe exhaust already before doing the delete). No hesitation or lag, it just went.

On another note though, I see that AFE has both Turbo Back and Down-Pipe back exhausts. I haven't got to see or mess with a new diesel Canyon and so I have no idea where things are at under there. Such as, is the muffler and DPF all one piece or is perhaps the DPF inside the down-pipe? On a 2004 Duramax, you could change out the down-pipe for a new less restrictive one, but it was a nightmare to replace, so I went with a down-pipe back exhaust. Perhaps the same is true with the 2.8 Duramax? Just have to see if there is any downside to keeping the stock down-pipe and if it would be all that difficult to change out the stock one or just go with a down-pipe back exhaust with no muffler.

The muffler and dpf are separate on our trucks. The muffler is the last thing on our exhaust besides the tail pipe. While the dpf is the first thing off the downpipe. Since these are just a in line 4 cyl with the turbo on the passenger side. I don't think that the turbo back exhaust on these would be hard to install since you will have more room as compared to the downpipe on the 6.6. But if you are going to go this route, you will need to find a different tuning company. DuramaxTuner does not offer support for emission delete capabilities.
 

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The muffler and dpf are separate on our trucks. The muffler is the last thing on our exhaust besides the tail pipe. While the dpf is the first thing off the downpipe. Since these are just a in line 4 cyl with the turbo on the passenger side. I don't think that the turbo back exhaust on these would be hard to install since you will have more room as compared to the downpipe on the 6.6. But if you are going to go this route, you will need to find a different tuning company. DuramaxTuner does not offer support for emission delete capabilities.
That's true, about the DuramaxTuner not supporting emission delete capabilities anymore. But MotorOps out of Canada will and I believe there are associated with DuramaxTuner somehow. Here is the link to their website for the 2.8. http://motorops.ca/duramax/duramax-tuning/2-8l-duramax-canyon-colorado-auto-cal.html
 

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Sorry to re-hash this or maybe asking a stupid question, but I am new to warranties. I'm really digging the way your Colorado is sounding with the turbo back exhaust, but if I'm understanding you correctly it voids the warranty?

What if I still did the turbo back exhaust but kept the stock exhaust and put it on before it goes in the shop? Or is this not possible? I'm still new to all of this, but I'm trying to customize this truck some
 

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Sorry to re-hash this or maybe asking a stupid question, but I am new to warranties. I'm really digging the way your Colorado is sounding with the turbo back exhaust, but if I'm understanding you correctly it voids the warranty?

What if I still did the turbo back exhaust but kept the stock exhaust and put it on before it goes in the shop? Or is this not possible? I'm still new to all of this, but I'm trying to customize this truck some
Warranties are not voided completely by any modification to any part of any vehicle it is federal law that governs manufacturers to investigate the cause of the problem and if yes in fact your turbo back exhaust caused the issue then you'll be responsible to fix it. However if it is an unassociated part in need of repair they're obligated to fix, just make sure you find a legitimate resource to take to them if it is ever in question.

Good example would be: have an intake and the alternator goes out... not attributable...suspensions are complicated as lifts can cause wear and tear on your diff so do your homework you should be fine. Every part associated to whatever modification is acceptable risk you will take by upgrading.

Remember they must investigate and confirm that the modification caused the malfunction.
 

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Warranties are not voided completely by any modification to any part of any vehicle it is federal law that governs manufacturers to investigate the cause of the problem and if yes in fact your turbo back exhaust caused the issue then you'll be responsible to fix it. However if it is an unassociated part in need of repair they're obligated to fix, just make sure you find a legitimate resource to take to them if it is ever in question.

Good example would be: have an intake and the alternator goes out... not attributable...suspensions are complicated as lifts can cause wear and tear on your diff so do your homework you should be fine. Every part associated to whatever modification is acceptable risk you will take by upgrading.

Remember they must investigate and confirm that the modification caused the malfunction.
Thanks for the info. It's pretty much up to my risk then. If I do lift it, I've already talked to the dealership and if they install it then nothing is voided. They did say if I did exhaust, to keep the stock exhaust and put it back on. I guess it's just a risk you have to be willing to take.
 

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Sorry to re-hash this or maybe asking a stupid question, but I am new to warranties. I'm really digging the way your Colorado is sounding with the turbo back exhaust, but if I'm understanding you correctly it voids the warranty?

What if I still did the turbo back exhaust but kept the stock exhaust and put it on before it goes in the shop? Or is this not possible? I'm still new to all of this, but I'm trying to customize this truck some
The only thing though with removing the exhaust, you have to get it tuned. If you don't, I believe the truck computer will freak out and probably go into limp mode because it is sensing that the CAT and DPF and possibly the DEF (not sure where that is located though, if it is in the exhaust system or not?) are not connected. If you get a tuner from whoever mrbones got his tuner from, or go with the link I mentioned above about MotorOps (who is the Canadian DuramaxTuner equivalent), then it will tell the computer, in plain terms, that those parts are still there and to go about normal business.

The only problem I have heard though is that, I believe, if you ever take the truck in to be worked on and they hook up to the diagnostic port/ ECM, they can tell that you have tuned the truck before, even if you go back in and uninstall the tunes before you go and put your stock exhaust back on. If anyone knows different then by all means share. I too would love to tune my truck, but I don't really want to risk voiding the 8 year warranty. Kind of want to see how the truck does for a while before I tune and delete it.
 

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Discussion Starter #16
The only thing though with removing the exhaust, you have to get it tuned. If you don't, I believe the truck computer will freak out and probably go into limp mode because it is sensing that the CAT and DPF and possibly the DEF (not sure where that is located though, if it is in the exhaust system or not?) are not connected. If you get a tuner from whoever mrbones got his tuner from, or go with the link I mentioned above about MotorOps (who is the Canadian DuramaxTuner equivalent), then it will tell the computer, in plain terms, that those parts are still there and to go about normal business.

The only problem I have heard though is that, I believe, if you ever take the truck in to be worked on and they hook up to the diagnostic port/ ECM, they can tell that you have tuned the truck before, even if you go back in and uninstall the tunes before you go and put your stock exhaust back on. If anyone knows different then by all means share. I too would love to tune my truck, but I don't really want to risk voiding the 8 year warranty. Kind of want to see how the truck does for a while before I tune and delete it.

Yes, they can tell a truck has been tuned by hooking up to the computer even if you retune it back to a stock tune. And there are a few exhaust kits, like by aFe that are dpf back that you would not need tuning for, but to really see any gains from changing out your exhaust, you will need a full turbo back or downpipe back system, which will requiring tuning to be able to use it, but will also have the highest performance and mpg gains.
 
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