Welcome to the forum
very good choice with the FI exhaust. The resonators that the FI exhaust come with silence the sound in the cabin, so I have been told, if you look up on YouTube you will find some pretty good videos of the FI exhaust with and without hfc and even some with hfc. The larger the resonator, the lower the sound in the cabin, Im sure Tony explain all of this to you but in case you forgot now you know. All in all it doesn't matter what you put with the FI exhaust, it is going to sound a amazing and I'm more than sure you will love it. I'm more than sure someone on this site has the setup you are looking for but if you do not happen to get the answer you are looking for just remember that hfc will add some rasp to the exhaust unless you get resonated hfc from FI or ark. But it really depends if you will like the combination of that CBE with hfc or rhfc. It's all preference. Good luck with the Z and have fun!
