This exhaust utilizes a very interesting design with an internal exhaust baffling that can be opened for full power or closed for optimal comfort. There is also a basic version with less complicated piping.
Full version:
Power Craft - Hybrid Exhaust System (Dual Sound, Twin Valve)
Basic version:
Power Craft - Hybrid Exhaust System, Basic Version
They have also released a new Y-pipe for maximum power gains for your Z!
Power Craft - Y Pipe, Straight Design, Stainless Steel
This is probably the most complicated but also one of the most interesting exhaust designs I've ever seen. What do you all think?
-Hunter