L Duncan

Firstly do they offer it on the 2015 Z06, and secondly what type of performance gains do you expect and thirdly, how much different will the exhaust sound compared to regular stock one?

Kingspoke

Comes standard & expect may be 5-10hp gain (5hp gain with the Stingray).

L Duncan

So all new 2015 Z06's come stock with NPP?

Kingspoke

Yes!

zeshawn

what? The NPP is the only exhaust for the Z06, so what do you mean about the hp gains?

OH THREE Z

The Z's will come with a dual mode exhaust, but I suspect it will have larger piping as well as a more aggressive sound than the Stingray NPP.

Kingspoke

Those gains would be in comparison to the Stingray's standard exhaust, which in that case saw a 5hp gain with the NPP. Add to that add hp of the Z06 & you could reasonably expect equal to the 5hp gain or more.

If your point is there is no gain, since the Z06 does no offer a non NPP exhaust to compare to, .....OK! The point being the NPP offers an increase in hp & sound modulation, & is very popular option on the Stingray for those reasons.

CaryBob

Here's how the Order Guide describes NPP for the Z06:

Exhaust, performance, aggressive exhaust sound, with 4" polished stainless-steel tips.

And here's how it is described for the Stingray:

Exhaust, performance, increases to 460 horsepower, aggressive exhaust sound, with 4" polished stainless-steel tips

Sounds like the same thing.

OH THREE Z

I was speaking more to the size of inlet side of the exhaust as I don't think there is much room to increase the size of the tips on the Z. Also I expect the Z to have a louder note. Basing this solely on the differences between the NPP on base and GS C6's and the Z06/ZR1 exhaust. My 12 Z06 even with the 4 cat setup sounded great, with headers it is flat out nasty.

ZFORME

How many catalytic converters are on the C7 Z06? I live in upstate NY so I need the emissions stuff or I can move to a county in PA that has no emissions law so no cats required.

mikegaan

Test drove a 2015 Z-51/A-8 an hour ago. In the settings controls, there are 4 choices that control how soft or loud the exhausts sound. The quietest choice is "stealth". Can't remember the names for the other three, normal, sport and open(?). Whatever, the sounds are definitely different.