I was always under the impression that fixing new headers will void the warranty , got to know today from the dealer that I can get new headers with o2 sensors which will add power and give better sound ( I already have the NPP )
I am surfing the net to find new headers but I am clueless on these things , I found long tube headers , different diameters , etc....
I need only headers , no x pipes , no cat back ( blug and play to my exhaust ) and has the sensors so the check engine light will not come


please help

 

I think the word is that if you get headers that require a new tune then it's the tune that will void your warranty not specifically because you have headers. The only headers I have seen discussed here that don't require a tune and will not throw a CEL are the American Racing Header 1 3/4" mid-length. That is what I am planning on putting on my '16 Z06. These are also plug n play and will bolt up to your stock x-pipe. Long tubes won't and will throw a CEL and require a tune.

 

yes sir ARH mids with cats....there 1 3/4 not 1 7/8

 

Fixed it. Thanks.

 

Technically, long tubes don't REQUIRE a tune. But if you don't want the CEL light, a tune will eliminate that.

The Check Engine Light is triggered by the rear O2's being located further back which changes their reporting characteristics. The front O2's are the important ones that are used by the PCM to adjust the air fuel ratio. The rear O2's only monitor the cats efficiency.

When you get a tune, one of the steps is to shut the off the trouble code report of the rear O2's. Nothing in the tune is actually changed but by clicking a box on the DTC page in HP Tuners, that fault won't result in a CEL. Very simple actually.

However, there can be other benefits from a tune...amoung them are changing the power enrichment, ignition advance, CAGS turned off for the M7 cars, and active fuel management turned off.

So, do Long Tubes REQUIRE a tune....not really....but if you want to keep the CEL light from coming on, yes get a tune. If the tuner is good, they will also optimize other parameters that should increase power and other things I mentioned earlier.

 

According to the dealer tune will immediately void the warranty , the whole idea that I needed better sound as well as few HP without losing the warranty .
I just purchased the ARH mid-length with CATS , hope I will feel the difference .

 

how difficult is it to reflash it back to stock ? and will the dealership know ?


can you put spacers to fix the CEL or buy headers with cats ?


thanks


im wanting to do the same at some point,

 

The dealer will know as the history is kept somewhere is the car itself , so even if you remove every thing ( which is not easy and not cheap ) they will know .
I doubled checked with head of service for the ARH mid length and he suggested to get it with cats . and my warranty should be OK

 

The dealer either does not understand how warranties work, or is lying to you. Loading a tune will not automatically "void your warranty", that is a very broad statement. It is the responsibility of the warranty carrier to prove that the aftermarket part is the cause of the warrantied failure.

Example... You load tune, the nav system goes out a week later, it will be replaced under warranty (assuming it is covered) (unless GM can prove your tune was the reason it failed). The burden of proof is on the warranty provider. If you install long tube headers, tune out the CEL, and the motor has a catastrophic failure, you still have a warranty, unless GM can prove that the modifications were responsible. It does not "void" your entire warranty.

http://www.autoanything.com/popups/MossWarranty.aspx

https://www.consumer.ftc.gov/article...intenance#will

 

Is this true, most other threads I have read said this requires a tune to not ruin your engine or to get any real power out of the upgrade.

 

The problem is if GM refuses to warranty your car the burden of proof is on them but you'd have to take them to court. It is very clear in the warranty that if you change the tune, it voids the power train warranty. It is very easy to prove the car was tuned. Now you have spent several thousand dollars to lose in court.

If you tune your car and the radio goes out, GM cannot refuse to fix it under warranty. Most dealers would not refuse anyway as they get paid by GM for warranty repairs and most repairs do not require sending ECM data to GM. If GM did refuse to work on the radio due to a tune, you could sue them and would probably win. You'd still be out several thousand in legal fees.

The only way GM could void your entire warranty is if the car was totalled or paid off by the insurance company. GM then puts a warranty block on the VIN.

Not to bust any bubles but mid length headers will not give you any more power. The C7's manifolds are very free flowing. Even LT's provide minimum gains on the C7.

 

Several good threads on the ARH mid lengths, I think some guy got 25 whp on the dyno. There is even a good video of guy running ARH mids where he has a GoPro with rear mounted microphone. Sounded really good.

I went with full LT's, cats, and professional tune. Car is a completely different animal

 

If GM reads the ECM data, they can tell how many times the ECM has been flashed and when the last flash occurred. If that information doesn't agree with the data the GM dealers have logged when the car has been in for warranty work, you have a problem. Again this only happens when the repair is a major incident ( in terms of repair cost) and is not covered by a recall.

For instance, lets say you damaged the engine, tranny, or any expensive part of the drivetrain and you or your tuner flash your car back to stock and remove all mods that may have helped caused the failure. GM can also tell mileage at the last flash point. They will also have a dealer record of the mileage for all dealer flash points and the number. GM will deny the claim if the dealer created records don't agree with ECM data. There will also be ECM data on many engine parameters that occurred before and during the failure. So, if your tune caused a lean condition etc, they have ample data to win in court if you try and sue for them to pay. But, even if you win, like others have said, you likely will have big legal costs up front, and likely GM won't have to reimburse you.

This same issue happened to me on a 2010 Ford 3.5L Twin Turbo. Ford told me that my vehicle had been flashed around 100 times and that the last flashpoint was 12 miles before the dealer read and sent the data to Ford. All this was true. So $$$$$ later my car was good to go.

Truthfully, our engines are very strong and short of running a supercharger and methanol to supplement the fuel issues, or a bad tune, you will very likely never have an issue. The jury is still out on the A8 and the electronic rear end in Z51 and Z06 at this time. To tear into the rear of the car for repairs to the tranny or the rear end is a 24 hour labor cost. So it could actually cost as much most engine repairs, short of breaking a rod and knocking a hole in the block.

Just my 2 cents....

 

I went ARH mid-length with cats due to the fact that they can be installed and run without a tune being applied. A tune will get more from them and my overall combo installed on the car, however, one could reasonably argue that with what I do have installed there is no reason to apply a tune to make it work or eliminate a thrown code.

Do you mean this one?



My other favorite:

 

Yup, the bottom video is the one I was talking about. Dang that car sounds good

 

so american racing headers is basically the only headers you can use that will not through a CEL code ?


thats my biggest concern,


my local dealership said they have no problems with exhaust systems or tunes even headers but once you tune it games over,

 

Kooks headers with Green cats will also work.
See my thread here..
https://www.corvetteforum.com/forums...s-headers.html

I also will re-iterate that the service manager at our local dealer told everyone in the Corvette club that a tune would void the power train warranty should a major issue come up with the car.