Btw, just in case someone does decide to get a set, you can get them here.
Buy Now: Velocity Stacks for your Hayabusa
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(feels like I am teasing you guys a bit
)
As long as people thirst for better performance, these items will always be around. Velocity stacks have been used for decades to try to boost performance. You'd probably have to dyno test the bike back to back to see a discernible difference, and they'd likely work best in 1000cc plus bikes, but then again 2-4 horsepower to some is good enough motivation. Tell me again how much $$$ you've invested in your bike? I've stopped counting.