New truck exhaust.

[Duramaxman1986]

I am thinking about putting a new exhaust system on my truck i have an 2007silverado classic LBZ. I am woundering if i put a turbo back system on the truck would it void my warrenty also i am woundering if anyone can tell me if there is really any diffrence in the single exhaust and dual exhaust performance wise because i would like to put the dual on the truck but i notice alot of diesel trucks i see only have the single exhaust and i am just woundering if that is just because it is what they like or is it an performance issue. Thanks alot for your help.

[mr. monte]

a turbo back kit WILL void warranty, that's why my stock exhaust is in my shed, if I need the stealership, I can pop it back on:D

[DmaxMaverick]

Welcome to the Forums!

An aftermarket exhaust will not void your warranty, but many dealers will decline to diagnose an engine problem (under warranty) if you have one in place. Good idea to have the OEM system around in case you have to go to the dealer for warranty work. Another problem with aftermarket exhaust systems (as with any other performance part) is some dealers will assume you have done other performance modifications (some that will black ball you from warranty coverage for any powertrain problem) just because you have it. The dealer cannot "void" your warranty for any aftermarket modification, but can deny warranty coverage if an aftermarket item causes a problem with a covered OEM system. Although some dealers, it seems, will deny you a powertrain diagnosis if you have aftermarket radio knobs installed. If you have a specific dealer that will be doing warranty work for you, it's best to talk with the service manager to find out where they draw the line. Some are down to earth with some common sense, and others are "by the book" anal about it. Another thing to consider is the catalytic converter. If you remove it (turbo back system), you are "tampering" with an emission system, which will allow the dealer to deny warranty coverage for any emissions related system, which covers just about the whole engine. It depends on how strict the dealer is.

As far as performance goes, I think single is better. Exhaust needs on a TD are very simple. Get the gases out of the engine with as little restriction as possible. A dual exhaust system has more bends and a Y (restrictions) in the system. It may not be a measurable amount, but I haven't measured it. Duals have a different sound and appearance, which would be the only advantage over a single. And, they are generally a lot more $$.

[Duramaxman1986]

Welcome to the Forums!

An aftermarket exhaust will not void your warranty, but many dealers will decline to diagnose an engine problem (under warranty) if you have one in place. Good idea to have the OEM system around in case you have to go to the dealer for warranty work. Another problem with aftermarket exhaust systems (as with any other performance part) is some dealers will assume you have done other performance modifications (some that will black ball you from warranty coverage for any powertrain problem) just because you have it. The dealer cannot "void" your warranty for any aftermarket modification, but can deny warranty coverage if an aftermarket item causes a problem with a covered OEM system. Although some dealers, it seems, will deny you a powertrain diagnosis if you have aftermarket radio knobs installed. If you have a specific dealer that will be doing warranty work for you, it's best to talk with the service manager to find out where they draw the line. Some are down to earth with some common sense, and others are "by the book" anal about it. Another thing to consider is the catalytic converter. If you remove it (turbo back system), you are "tampering" with an emission system, which will allow the dealer to deny warranty coverage for any emissions related system, which covers just about the whole engine. It depends on how strict the dealer is.

As far as performance goes, I think single is better. Exhaust needs on a TD are very simple. Get the gases out of the engine with as little restriction as possible. A dual exhaust system has more bends and a Y (restrictions) in the system. It may not be a measurable amount, but I haven't measured it. Duals have a different sound and appearance, which would be the only advantage over a single. And, they are generally a lot more $$.


So would that mean that if i got the cat back exhaust it would not be any issue or would that still be possible that they could make it out to be something it is not?

[speeddrive1]

Is there something wrong with the stock system? why chance the warranty issue.

[DmaxMaverick]

So would that mean that if i got the cat back exhaust it would not be any issue or would that still be possible that they could make it out to be something it is not?

Although there is no reason a cat-back system would cause problems with the dealer, some of them will find a way to use it as an excuse to deny a claim. A cat-back system is pretty easy to swap out, so it wouldn't be a big deal to change it back to OEM for powertrain warranty visits. Check with the service manager. He may not see it as an issue.

That said, I think it's a waste of time/money messing with a cat-back exhaust system. The main restriction is the cat, and that will still be there. The OEM system is pretty good for at or near stock power levels. If the sound is all you are after, a muffler change (or delete) could get you what you want.

[linchhummmer]

now they make a high flow cat which helps with the restriction. i think that you see more single pipes because its not like the exughst flows from the manifolds to the exughst its just one pipe stock but if you want to put the gale banks big hoss and run true twin turbos then you could. but since you wont i think duals are stupid