PhilH20s

looking for feed back. Recently purchased dual mode Gen 3 fusion Billy Boat exhaust for my C7 and there is no difference in sound between closed mode and open mode. Valves are working. Has anyone else had a similar issue with this system?

Dufox

Hi, where did you source the vacuum line ? can you pls. show me a picture if possible?
Thanks.

PhilH20s

Not sure what Vacuum has to do with anything. Can you explain? Valves are opening and closing as advertised but no sound difference whether idling or under load. Makes me wonder why pay for NPP option if you don't actually get any sound difference. I have decided to move on to Borla and try theirs.
No disrespect to Billy Boat. Their system sounds great (if you want it loud all the time). As a matter of fact they were very responsive to my issue with their NPP exhaust and tried to resolve it but with little success.
All good people at Billy Boat.

Dufox

The BB fusion gen 3 valves are controlled by a vacuum line which is triggered by a key fob. This is the BB fcor-0663. see my attachment.
was this what you bought?

Dufox

I installed mine last week. Dual mode works fine. sounds great when valves open. when closed, has low growl, a bit louder than stock.