[austinb]

Axlebacks are one thing. Cutting out a mid-muffler is another.

But.

I've owned many performance cars from many different manufacturers. I can tell you that just about every one of them told me that any modification/removal to emissions systems, namely primary cats, would void powertrain warranty. Just a price you pay if you want to play

 

[boost_lee]

I've been happy with the sound of my Solo axle back and secondary cat delete. I'm reaching out on a limb here, but maybe those of you with the same setup can help...

I wanted to see how the cold-start/cold-idle volume compares between the setup mentioned above and a Kooks LTH/HFC/Stock muffler combo. I realize that WOT would be much louder, but I feel that my current setup is about as loud as I want a cold-start to be. Have any of you heard the two systems in person and if so, could you share your experience?

 

[jimster480]

I don't really see it being a problem, if anything were to happen then I could put it back to stock for the dealer.
But honestly I don't see how an exhaust pipe would void an engine warranty, or how an engine would fail from changing exhaust piping.

I bought this car to enjoy it, if you don't enjoy what you buy then you shouldn't ever buy it.

 

[2016Machine]

The only thing it could possibly do is void the warranty on the catback itself..

 

[TheMealOnWheels]

Fun fact, it was determined by the dealer that the secondary cat on the PS collected all the guts from the primary cat on that side when it failed on my car. When it collected all that material, it plugged and caused the engine failure on that bank. Just think, if I had the secondary cat missing, it may have saved the motor from what they were saying! Just saying... lol

 

[2016Machine]

fun fact, it was determined by the dealer that the secondary cat on the ps collected all the guts from the primary cat on that side when it failed on my car. When it collected all that material, it plugged and caused the engine failure on that bank. Just think, if i had the secondary cat missing, it may have saved the motor from what they were saying! Just saying... Lol

hahahaha ! This!!

 

[Jpturk]

Secondary cat delete, resonator delete and solo j axel back on stock header. No codes running this set up with tune and intake for 15000 miles.

https://drive.google.com/open?id=0B81PbG2TSnWgb2dtcEFCZEltVUU



Sent from my iPhone using Tapatalk

 

[sscanrun]

Secondary cats

What about passing emissions

 

[Jpturk]

What about passing emissions

No issues.


Sent from my iPhone using Tapatalk

 

[IZRED]

... some of you guys got a LOT to learn ...

And isn't what this and all other forums are for? To learn about our cars?

 

[2074]

And isn't what this and all other forums are for? To learn about our cars?

Yup; but their is such an animal as "right" vs "wrong" ... and there are more "wrongs" here than "rights" by a huge margin and it is growing exponentially with all the "Johnny come latelies".

 

[austinb]

Engine 101: Secondary O2 sensors do not provide the vehicle with air/fuel data that is measured/changed - only to check primary catalytic converter efficiency. The likelihood of removing secondary cats, via pipe or catback, and causing damage is slim to zero.

But, depending on your dealer, I still think there is probable cause for GM to point a finger at your undercarriage and deny coverage - it doesn't always have to be causation.

I've been burned by this some times and was not even an issue in others. This is, and always will be, a grey area.

 

[Bo799]

Reality is that people sit and twist things around in their head to try and get the outcome they want. Why would gm warranty their build after "expert" Joe blow muffler man cut up the exhaust? Just doesn't make sense in the real world. If you just put it back to stock, take it back to the dealer for repair, that's nice and crooked, thank you for making our cars cost more too.

 

[2074]

Reality is that people sit and twist things around in their head to try and get the outcome they want. Why would gm warranty their build after "expert" Joe blow muffler man cut up the exhaust? Just doesn't make sense in the real world. If you just put it back to stock, take it back to the dealer for repair, that's nice and crooked, thank you for making our cars cost more too.

perfect

 

[2016Machine]

Mod like ****(heck), have fun.. its just a car!

 

[MBB]

I had my secondaries and resonator removed this past weekend. I'm pleased.

 

[jimster480]

Reality is that people sit and twist things around in their head to try and get the outcome they want. Why would gm warranty their build after "expert" Joe blow muffler man cut up the exhaust? Just doesn't make sense in the real world. If you just put it back to stock, take it back to the dealer for repair, that's nice and crooked, thank you for making our cars cost more too.

But it's not the reason for failure. So i can understand doing something just like that.
If people were still honest and dealers were honest then things like that wouldn't ever be grounds for voiding warranty.
The ecu is more than capable of adjusting to such a small change and there is 0 reason for engine failure due to a small mod like that.
It's like saying the engine blew up because of a drop in filter.

Sent from my HTC 10 on Sprint

 

[2074]

But it's not the reason for failure. So i can understand doing something just like that.
If people were still honest and dealers were honest then things like that wouldn't ever be grounds for voiding warranty.
The ecu is more than capable of adjusting to such a small change and there is 0 reason for engine failure due to a small mod like that.
It's like saying the engine blew up because of a drop in filter.

Sent from my HTC 10 on Sprint

Prime example of what Bo799 said which I agree with and I quote:

"Reality is that people sit and twist things around in their head to try and get the outcome they want."

Dealers have nothing to do with voiding warranties. When will you all get this thru your heads!!! Read you warranty; you modify you void. Clear as the nose on your face and printed in black and white.

 

[jimster480]

Prime example of what Bo799 said which I agree with and I quote:

"Reality is that people sit and twist things around in their head to try and get the outcome they want."

Dealers have nothing to do with voiding warranties. When will you all get this thru your heads!!! Read you warranty; you modify you void. Clear as the nose on your face and printed in black and white.

Yes, I know what you are saying but in reality I have 0 care about what you are saying. Things should be warrantied if the product is good period, but the truth is that NOBODY wants to EVER pay $1 in any warranty claim. So regardless of what happens whether you mod or not you better believe that they will do anything and everything they can to avoid paying ONE DIME of ANYTHING if they don't have to.

Additionally if I modify my exhaust, it shouldn't affect any part of the warranty that isn't connected to the exhaust. My bumper to bumper warranty should still hold period because the things are not at all related.

But the truth is that I wouldn't ever be taking my car to a dealer for a new engine anyway because I changed the exhaust, because the reality is that the engine wouldn't ever blow up because of the exhaust in the first place. But if I took my car to a dealer to replace the infotainment system because it burned out, and they tried to tell me they can't honor the warranty because I changed one of the exhaust pipes then that would be complete BS.

 

[72SBC]

Prime example of what Bo799 said which I agree with and I quote:

"Reality is that people sit and twist things around in their head to try and get the outcome they want."

Dealers have nothing to do with voiding warranties. When will you all get this thru your heads!!! Read you warranty; you modify you void. Clear as the nose on your face and printed in black and white.

Corvette LS3 Engine - Chevy's New Small-Block - Vette Magazine




"we contacted John Rydzewski, Assistant Chief Engineer, Passenger Car Small-Block Engines at GM Powertrain."




Vette: Did you design the LS3 with future modifications in mind, so enthusiasts can easily add horsepower?
JR: There's always room for improvement, so enthusiasts can do things, whether it's [reducing] induction-system restriction or exhaust restrictions. As I mentioned, you can polish these cylinder heads or take them out to a porter and do some work on the intake ports and the exhaust ports and get toward an LS7 in performance. There are camshaft options out there, too, that can get you more performance. What we put together is a good balance. It gives you emissions capability, fuel efficiency, and much more performance [than the LS2]. It's a quieter application, too. We've added some features for refinement, but someone who wants to actually go out and increase the performance of the LS3 has a lot of capability to do that.
Vette: How do you feel about power adders on the LS3 to elevate its horsepower output to supercar status?
JR: We expect it. Many of our buyers do quite a lot of things to our vehicles and take them on tracks and enjoy their performance, and we get good feedback that way. There are many aftermarket performance parts out there, and we expect our customers to do things like that.



How about them apples ? :wink