save the $1195 and get an aftermarket exhaust? Will the warranty be VOID if aftermarket system is installed? I am more interested in great sound than a few more horsepower. In your opinion, is the Chevy factory option exhaust worth the money? Does it sound much better than the stock quiet exhaust? Thanks!

 

Imo I would get the npp then decide is that's enough for you. Worst case you get a Borla later or something that preserves your dual mode and if it becomes too loud you can dial it down. Right now I'm happy with the npp, but usually just leave it in Track mode. All of my other cars except the daily are louder tough. Just depends what you are used to. Imo get it because you can't add the technology later. Same with FE4 suspension.

 

OP Here. Thanks so much . That is a very good point. I had 3 C5's, one of which I put a Borla catback system on and loved the sound. I had a C6 that had the NPP that I never ran in quiet mode. I suppose it all comes down to not voiding the warranty. I don't want to drive around for years in a quiet Vette until the warranty is up and then put on a catback. If I were to have engine problems, or in the very unlikely case of a catastrophic failure, I would not want to eat the cost of a new mill because I had changed the exhaust!

 

Hi Buster, as long as the system does not modify or remove any emissions components (including catalytic converters) it will not void your factory warranty.

All of the systems we build are 50-state legal and warranty safe, meaning they only modify components after the catalytic converters. Our C8 system is still in the final stages of development, but if you'd like to stay updated on its release, you can visit the page below and click the yellow "notify me" button. Let us know if you have any other questions we can answer!

https://www.magnaflow.com/products/1...?aces=13398798

 

Will you guys be offering a carbon fiber tip option? I don't want any usual tips.

 

Billy Boat Exhaust will be offering a number of tip options including 4.5" carbon, 4.5" stainless, and our Speedway tip.

In general anything that is installed after the catalytic converter is not an emissions related item and will not void any warranty. Changing the cats could be a problem, and I would caution with headers. Even though they do not perform an emission function, they are in front on the cats and could be deemed an emission item. When we received our EPA exemption for our C5 header it still had to be tested and approved even though we did not change the factory cat or its location.

 

For the majority of passionate enthusiasts, OEM systems don't quite scratch the itch - whether it's the "base" option or the NPP.

Our Supersport X-Pipe has been our best seller for the C8 - and our carbon fiber tips have been the most popular way to finish the system off (we can all agree the stock tips are pretty awful):




For those who opt for NPP from the factory and would like to retain the functionality of a valved system, our Valvetronic Maxflo will be released soon:




Cat Bypass Pipes or Sport Cats can be added as well for customers seeking the next level of sound and performance. You can view our full suite of C8 offerings: HERE

 

The final design of our C8 kits has not been finalized yet, but we are entertaining the idea of a carbon tip option along with the standard polished and ceramic black finishes. Stay tuned for the final production models!

 

We currently have our exhaust in production and are taking $100 deposits on the first batch which we are doing a group buy at a super low price. If you are interested just contact us to get in on the group buy.

 

Any update or new videos?

 

subscribing - my C8 is too quite - I have npp and mild to wild, and still not happy with sound from the care - same setup in C7 Z06 was wonderful .... guess I'm going to have to go aftermarket ... but after much research on aftermarket for C8, I'm not certain what to do ...

would love a sticky on subject for an easy place to see the latest on one of the most important aspects
of any sports cars - the exhaust

 

I too am confused what exhaust to get. I do not care about dialing up or down the sound - I would like to have same sound all the time, and not have to deal with valve actuators on the C8 - that are bound to have problems even worse than those on the C7 since there is so much heat generated in so tight an area and with such close tolerances. Problem is I want the Z51 that comes with NPP - can a new exhaust without NPP valves be installed ??? I am not sure how all this works with that stupid system of shutting 8 cylinders down to 4 - which I wish could be turned off or eliminated.

 

Buy Hi flow cats (HFC) they will give you the sound you are missing. There are a few reasonably priced brands for $1200-1400 dollars.

 

You should be a little suspicious of sport cats in that dollar range. It's an indication corners are being cut somewhere - likely the physical size and/or quality of the catalyst cores, heat shielding, or both.

We use HJS catalysts exclusively in our Sport Cats - they are, quite simply, the best in the business. This premium quality comes at a more expensive price. But you do get more for your money:

Cell Count Matters
HJS catalysts are 200 cells per square inch (cpsi) - better flow and power
Some competitors in the $1,200 - $1,400 range are using 400cpsi - this means they are more restrictive, less flow, less power

Size Matters
The HJS cores we use for the C8 have a diameter of 143mm - 5.62 inches - greater cross section means less restriction and more power
Some competitors in the $1,200 - $1,400 range use GESi cats as small as 4.5 inch diameter - less cross section means more restriction and less power, especially when combined with a higher cpsi count

Saturation Level of Tri-Metallic Core Matters
HJS cats have a very high concentration of the Platinum, Rhodium, and Palladium - the precious metals that react with exhaust gases. This super-high concentration of these metals is what allows for a lower cell count, while maintaining emissions targets. These metals, and the process to adhere them to the core is expensive - but it is the key to better performance and durability. This is what allows us to stand behind our No Check Engine Light Guarantee.
Some competitors in the $1,200 - $1,400 range cannot possibly have as high of the precious metal content at that price point.

Heat Shielding Matters
Our Sport Cats include military-grade Kevlar blankets to keep engine bay temps down
Some competitors in the $1,200 - $1,400 range offer heat protection as an add-on option - others don't reference consideration of heat shielding at all

Caveat emptor

 

The exhaust I am currently running on my car FCOR-0715 Billy Boat Bullet for the C8 Corvette does not use the NPP valve. My car is a 3LT Z51 with NPP, but the system is designed to have the NPP acuators mounted to a plate on the exhaust. They move but they do not function. This system also does not have the AFM valve, so I drive it in manual in the interstate to keep it out of V4 mode. We also build this same system with the AFM valve so you dont hear the V4 mode, and also the full Fusion system which retains all the factory AFM and NPP functions.

Please check out our website www.bbexhaust.com for more details.

Billy Boat

 

Save the $1200 and get both headers and exhaust.