I only have the TSR Air Intake Funnel.
It basically replaces what I call the air box snorkel and simply holds the air filter in place. While this intake funnel helps, it doesn't eliminate the big intake bottleneck. Namely the 35mm diameter opening into each of the 4 throttle bodies are restricted by 25mm funnels. And that's where the air funnel kit comes in.
I can believe a 20hp gain with a combination of the air intake funnel, 4 air funnels, cat free (open headers) and hi flow exhaust.
Some have dyno'ed their bikes with all these components for the kit. It would be great if you took the lead.