BBExhaust

The following is information on the new Fusion exhaust from Billy Boat Performance Exhaust. Right now I only build it for the Z06 and the C6, but I am looking at building a model for the C4.

Is this something C4 owners are looking for? Just looking for some feedback. Thanks Billy Boat

What is bi-modal exhaust?
The Fusion is a bi-modal exhaust system, meaning it has two passages, or modes, that the exhaust can travel through the muffler. Each of the mufflers has two outlets, with one side having a butterfly type valve which allows the exhaust flow to be shut off, regulating which side of the muffler flows exhaust. One side of the muffler is the “quiet” side, and one side is the “loud” side. The “quiet” side is a smaller, muffled and chambered tube, while the “loud” side is 3” tubing straight through.

How loud is it?
Through our development and customer feedback we have shortend the muffler for 2008, making the “loud” side of the muffler “louder”, which results in a tone similar to the famous Bullet system. In the closed position the tone would be slightly louder than the standard Route 66 system.

What controls the valves?
The butterfly is controlled by a vacuum valve, which we built and developed completely in house. On the Z06 and the 2008 C6 with the NPP option, this valve is controlled by the ECU. The valve opens based on RPM and throttle position. The problem is the factory exhaust is very quiet, even with the valve open. Our expertise here at B&B is getting the “tone” right for your Corvette, and we think we nailed this one. Even in the closed position, the tone is deeper, louder, and more aggressive. Open the valves, the overall volume and tone increases to the point heads will turn when you drive up.

What if I have a standard C6?
Not everybody has a Z06 or the 2008 with NPP, right? Billy Boat Performance Exhaust has spent months developing a stand-alone kit which allows any C6 to take advantage of the bi-modal system. The kit come complete with all the wiring, mild-to-wild switch, vacuum line, vacuum accumalter, and vacuum switch needed for installation. We have used the engine as the vacuum source (it is the same port the factory uses for the NPP) and the installation is simple and straight forward.

Is the system 2 ˝” or 3”?
On the Z06 the system is 3”, while on the C6 it is 2 ˝”. We do have an x-pipe available for both systems, and the standard C6 can be ordered in the 3” diameter to make a complete 3” system.

Will they bolt up to my stock H pipe or my stock headers?
Each part of the system will fit to a stock H-pipe or the stock headers. The parts can be mixed and matched (rear exhaust, x-pipe, and long tube headers) For best performance it is recommended to use the long tube headers, the 3” x-pipe, and the 3” Fusion.

Billy Boat has combined the best of the Bullet exhaust with the best new technology to give you the Fusion System for your Corvette. The muffler tips are double walled, 4" round or 4.5" oval. The entire system comes completely polished and the result is a truly spectacular look and sound that gives this high performance sports car the look and aggressive sound which will have heads turning everywhere you go

comp

96 lt-4

I would be interested to see what pricing would be.Another option I would like to see is an axle back system for those of us who do not want to replace the whole catback.Some sound clips would be great also.

Fastmax32168

There would definitely be the want for it, as us C4 owners all seem to want more performance from our cars and a performance exhaust is one of the first mods many make. Yet post after post complains about their new performance exhaust having too much resonance. So there is nothing not to like about an exhaust that gives you the best of both worlds. I think you will find that the price point is going to be the make or break for the C4 crowd however, not quite as much cash floating around here as on the C6 board.
Roy

Aurora40

I don't really know much about your systems, but why would the "quiet" mode be louder than other exhaust systems? Wouldn't you want the quiet mode to be pretty quiet? Bi-modal with "loud" and "really loud" as the modes seems kinda

So what would control it on a C4?

It sounds interesting, but of course I think the final success may depend on how much it costs, how loud and quiet the two modes are, and how easy the install is.

I personally would not want it if I had to tap into some engine vacuum line or electrical wiring or something in order to control the mufflers.

Edit: nm, I read the question following the one I quoted. Sounds like you have to tap into engine vacuum.

Hutch

Sounds interesting. Of course, cost will be a major element, here, but I for one applaud B&B for even considering development of a modern exhaust replacement system for the venerable C4.

Well done!

Aardwolf

I would be interested in having one but it will be priced to high for me.

STEVEN13

Digital Disaster

I imagine it would look cool (all your stuff looks awesome) but like the Corsa which also primarily uses a singe outlet, after a few weeks use one outlet on each side would be black and the other pristine, giving the appearance only one outlet on each muffler is functional - not a good look IMHO.

Demonic85

No thanks I like mine loud ALL the time

Does sound cool though.

Strick

I'm interested. I have your B&B 3" catback now on my vert, but I have a problem with clearances just in front of the resonator. The X-frame and mounting bracket are the problem. I wish I had the option of a 2 1/2" system. Now that you are coming out with a new system, would clearances still be a problem for us vert guys? Nothing looks better on a 91-96 Vette than the B&B catback. But that's my opinion.

jhammons01

Everything is cost dependent but if you could show an increase in performance as well I think this is a great idea.

Of course, this coming from a guy that thinks header caps are a good idea as well......but that is just me.

95wht6spd

I think the main issue with people is wether it will have resonance or not.

10.5Vette

I'd be interested, and be willing to pay a price in the $1200 range for low resonance and depending on the difference between loud and quiet modes.

SurfnSun

I would be interested.

I just picked up a corsa set b/c of the cruising resonance of the current B&B set up. It would need to be quiet like stock and then loud as hell when open for me to get interested.

Going from loud to louder isn't very appealing to me...as the market is already full of that product.

USAsOnlyWay

I'd be interested in just the mufflers with the a switch control. And I nearly agree, I'd want it to sound good and it could be a BIT louder than stock but not much. Then when you open it up, it can be loud as hell.

combustables

Hi there,

Ideally speaking, I would like my early C4 convertible to be as quiet as possible when my wife is in it (and that includes solving the resonance issue).

When I'm alone, I wouldn't mind a throaty sound (minus the resonance) and the ability to utilize all the extra power my loud 383 is capable of putting out.

My suggestion for arriving at a price for it would be to first specify the features then ask the forum to tell you what they think they will pay for those.

To me personally, solving the resonance issue and making the exhaust EXTRA quiet would definitely be worth up to a couple of hundred dollars in ADDED VALUE. That means I would pay up to couple of hundered bucks EXTRA for the "quieter than stock" and "resonance eliminated" features to whatever exhaust price you settle in for this thing.

Currently, I don't believe there is an exhuast system that claims to be as quiet as stock and only WALKER claims to have solved the resonance problem. I have a walker crossover rear Y pipe and it is a little better than a stock rear Y pipe but it did not completely eliminate the resonance. It lessened it but it's still there and I can hear it.

Anyway, I hope this helps and I hope you make this thing!

Thanks
Lee

kowalski340

interested in this system for my daily driver

jakers

mvettewhite

Please bring it on! This is exactly what I have been waiting for since I saw the option on the new vettes. Like the other post mention pay attention to the drone. I had a Borla catback on for about a month and canned it because of interior drone. Sounded awesome outside the car.