I dont see how that would work as the entire point in trumpet shaped itbs with the flute style valve is to create absolute minimal air flow disturbance.
Snake oil mate, just like vortex generators and fuel line magnets. If they made any noticeable improvement for minimal cost then they'd be fitted to start with
^^^ exactly. Plus more power means more effecient on fuel and tax. and im sure honda know how long they should make the throttle body lol, what a load of rubbish.