Hand Eye 8

Hi All,

Looking for more sound/volume from the stock NPP (C7Z). I was thinking either Corsa or Borla x pipe. However, I saw that ARH is offering mid length headers for stock/no tune. I don't want to void the warranty or risk it.

I'm looking for some feedback on the ARH mid length headers with cats. I was thinking of going this route, but was wondering how many people are getting CEL's after the install with stock tune.

Is anyone seeing a CEL with no tune?

Thanks

Kracka

A local guy here still needed to disable the check engine light with his ARH catted mid-lengths.

IMHO, the best 100% stock tune safe setup with no risk of a check engine light is ported stock exhaust manifolds + stock primary cats + Borla catless X-pipe. This route will be cheaper than a set of ARH catted mids and make similar power.

Hand Eye 8

Do you know of a shop that ports stock exhaust manifolds?

Custom Corvette Accessories

1-3/4" is a little small for a Z06 IMHO

Regards
Chip

countryroads

I have a 2017 Grand Sport with Haltech CAI, ARH mid-length headers with hi flow cats, Borla X pipe, with factory tune. I have over 2,500 miles on them without throwing CEL. I kept the stock muffler with NPP. I love the sound and with the headers you get the added benefit of extra HP compared to no HP gain from after market mufflers. I highly recommend the headers if you are looking for big sound, some extra kick, and don't want to mess with tune from long headers. The cost of headers and install was no more than aftermarket mufflers with NPP. The only reason I would consider an after market muffler at this point would be to change the tone as the headers and X-pipe added a ton of volume.

RussM05

I occasionally got a CEL with the ARH mid-length headers so shut off the CEL for the rear rear O2. Same thing with a friend if mine. We were early adopters of the mid-length headers.

I had the car into the dealer last week for minor warranty work because the PTM system wasn't there. They didn't bat an eye when I mentioned I had turned off the rear O2 CEL and disabled CAGS. They even went to extra effort to update the PCM software to get PTM working but not write over the tune I had done.

I don't think the mid-length headers sound as good as the full length I had on my C6. They sound a little sour to me.

Jack Be Quick Racing

Early mid-lengths reported some CEL issues but, I have not had any issues with mine. Long tube - you have to tune. Mid-length you don't have to tune it - makes the argument easier from a warranty perspective in my mind.

I did the Corsa off road x-pipe with the stock NPP - it made it a little louder, a little more raspy. It's a nice bump but don't expect too much. Then I added the Borla Atak dual modes. Deeper sound, got rid of the stock NPP raspy, tiny sound. But, not loud enough for me. Did the ARH mid-lengths and was much much happier with the sound - and performance increase.

If I had to do it all over, I would start with the headers and then work back as needed.

RussM05

ARH replaced our CATS after we got CEL. They included new O2 bung extensions so I believe we have the final configuration.

Kracka

Ruben @ SoCal Porting does, and has a set of cores for exchange.
https://socalporting.com/our-services/porting/ (bottom picture is a C7 collector)

Hand Eye 8

Exactly what I was looking for. I might keep the stock H pipe with the cats. Not sure yet. I was looking at the Borla X pipe also. This is probably the set I will go with.

Hand Eye 8

Thanks for the feedback!

I'm coming from a H/C/I 08 Z06 with Kooks 1 7/8 long tubes with Corsa Sport Axle back. That was pretty loud. I'm not looking to replace the factory NPP. I like the fact that I can still put the NPP in Stealth mode with headers for the neighborhood.

Added HP is a bonus.

Z06NJ

No issues whatsoever. Sounds amazing.

MerakiAutoworks

Might dump my axle back and get headers instead..

-Josh

AKKutz

Have early ARH mids, with hi-flo cats. Threw CEL constantly. Had to drive around with a hand held scanner to turn off the light. Got real good at doing this on the fly. I contacted ARH about this, they did offer to sell me a new set of cats to the tune of $900 +.


I wound up having to tune the car.....

spinkick

Why go through all that work and not do full headers?

Custom Corvette Accessories

We sell a ton of these just because of the NO TUNE...


https://www.corvettepartsandaccessor...racing-headers


Regards
Chip

spinkick

It seems like if you don't have to tune, how much power potential is in the part to begin with? If it doesn't affect the system enough to need tuning, it's more or less lateral movement

Custom Corvette Accessories

Generally - about half is what we see... (of long tubes and a tune)

Plus the way more better sound

Regards
Chip

spinkick

Can't discount the sound, that's for sure!

fatsport

Why risk the warranty on your Z06 for 20 horsepower. Borla X-pipe gives a great sound increase, is lighter, and adds a couple hp. Awesome mod!