the import EFI nozzle kit comes with a shark nozzle, and the pirhana comes with a pirhana nozzle...the shark nozzle is much more popular, effective, and durable from what I hear
^^yeah, what he said.
Personally I haven't heard much about the NX Pirhana Nozzle, but I hear the shark nozzle is a good choice. my friend has a shark nozzle on his '04 civic si