Does adding headers kill the warrantee? How about with Cat-less?

 

Headers, no. Tuning to optimize headers, yes.

No cats, no.

Keep in mind that everything I have told you is subject to your dealer.

 

It's really up to your dealer on the headers. The dealer may OK that, however if your headers require a tune, then it will void the warranty.

Going catless will void the warranty and I think it's also against federal law to remove pollution control.

Please understand that the term 'voiding the warranty'. With these mods, if your dealer says it will 'void the warranty', he's only talking about the drive train warranty. If, for example, your air conditioner goes out, that will be covered, however any engine, transmission, or rear end problems are not covered.

 

Personally, I think it would be a rare dealer that would honor the powertrain warranty on a C7 equipped with headers. I think you’d fight a loosing battle to try to make them honor it. Could be wrong. Don

 

If I do a diablo I can always revert it before I go back to the dealer and they can't tell correct?

 

As someone said previously, it all depends on your dealership. Some dealers are "mod friendly", most are not. More importantly, it depends on the type of repairs, the kind of mods you've done, and how/if those mods are related to your problem.

My previous performance car was a 2010 Camaro; supercharged, dyno tuned (565 RWHP), headers, etc, etc. I live in Metro-Detroit. There are 3-4 Chevy dealerships within a 30 minute drive of my house. When I developed an oil leak, one dealer wouldn't even let me in the door to diagnose the problem because of my mods.

I went to another dealer. They did the repairs under warranty. The leak was the oil pan and oil filter housing that also houses the oil cooler return lines. They had to drop the left side header to do the job. So, I agreed to pay $50 for additional labor. All other parts and labor was covered.

Before that incident, I did have a "warranty conversation" with that dealer's service manager. We had an understanding of what would, or would not, be covered. If I came in with a busted IRS axle or broken transmission output shaft, I'll have my pen ready to write a check.

I always kept a 8"x10" card in the glove box that I put on the front seat when I went to any dealership. It read: "Custom Tuned and Calibrated, Do Not Re-flash".

I no longer have the Camaro, but I retained that card and I'll keep it in my C7 because it now has a supercharger and has been calibrated.

Mariano (Alfie)