I've a 2014 Z51 and wondering if the investment would be worth it if I purchased new exhaust from engine back. Headers, X-pipe etc. Will it increase HP by any real amount relative to exhaust cost. Just wondering.

 

I have the AR 1 7/8's, no cats, stock mufflers, and a tune, 451.x HP to the rear wheels
2014 Z51 M7

 

Thanks for info...

 

Yes, headers and a tune should result in a decent gain. Whether that gain is worth the cost to you is your decision. Good luck in whatever you decide.

 

The sound improvement alone is worth it...

 

None of it's worth it to me, but to each his own. I do race cars on the race course.

If you are tracking your C7 it might be of some "real world" benefit. As for sound, I outgrew loud cars about the time I got into high-school, so that's not an issue with me. I've found, to the contrary, that the last thing I want while driving swoopy vehicles of any sort (and I've got a few) is to draw the gestapo's attention!

 

Thanks folks. I think I have to agree with Avanti. Love the noise once in a while, but not constant. I've been on the fence, but I believe I'll keep it "stock". Appreciate the responses and help!

 

Assuming that you have the NPP exhaust, putting it in stealth mode really quiets the headers down for those times when you want quiet. Put it back in Track mode to wake things up. Really is Dr Jeckyl and Mr Hyde.

 

I've read that would cause Chevrolet to void my entire warranty, and black-list me from ever buying anything from them again??? They might even send a Cuban hit-squad after me?

The tune, specifically?

 

If you tune your car GM will void your powertrain warranty, that's just a fact.

 

Is there any first hand accounts here of that happening? Ever? Or is this just something that keeps being repeated?

Because that's actually against the law. Any vehicle manufacturer would have to prove that a mod caused a failure you're attempting a warranty claim on, the burden of proof is on Chevrolet. They can't just void your warranty because you mod your car. And they also can't void all or a large portion of the warranty, just specific parts. In other words, if you change your shocks, Chevy's warranty won't cover them.

If you tune your engine, Chevy would have to prove that the tune caused some issue. If they can't do that, then the warranty is still in effect, by law. This is actually settled case-law, and I don't know why that info hasn't made the rounds here. It's called the Magnusson Moss Warranty Act.

In short;

"The Magnusson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, was created to protect consumer warranties.

According to this act, a manufacturer (Ford, Dodge, Chevrolet, etc) cannot void the warranty of a vehicle due to the use of an aftermarket part UNLESS they can prove the aftermarket part directly cause or contributed to the failure of the vehicle.

A consumer has the right to patronize independent retail stores and repair shops for parts and service without fear of voiding the new car warranty. The dealer/vehicle manufacturer has the right to deny a warranty repair but they must demonstrate that the aftermarket part caused the problem. The warranty remains in effect for all other covered parts."

Plus, dealerships have 0 motivation to pay any attention to your mods. A large part of their profits margin/dollars is warranty repair work, and if they don't honor the factory warranty, they lose money. So you'd have to have a very negative relationship with your dealership's service department (like, run over the service manager's dog, or date his daughter) to have any issue. Service techs will deliberately ignore your mods, as if they don't do the warranty work, they don't get paid.

Hell, on my Mustang I just had the rear wheel bearings replaced under warranty, despite much of my rear suspension (shocks, shock mounts, vertical links, IRS cradle lock-out & centering) being after-market. My service adviser, the tech that did the work and I stood under my car looking at all those mods, pointing at them and discussing them, as we tried to figure out what might have caused the bearings to fail. And then they sent me right out the door with the repairs covered under warranty.

 

I believe there are specifically "authorized" Chevy dealers that can beef up Corvettes and it won't void warranty. We have one in Charlotte ( Rick Hendrick) that has offered to do whatever I want and tell me warranty will not be void if they do it. While I was there they had 2 Z06's in back that were just purchased and had never been on street being modified for the new owners before they picked up. I'm not 100%, but that is what I was lead to believe about warranty.

 

Life is short, have fun mod your car!