Does anyone have any experience and/or knowledge about the benefits of purchasing' allegedly' performing enhancing velocity stacks ? These are on ebay atm HONDA FIREBLADE CBR1000RR4 RR5 RR6 RR7 VELOCITY STACKS RAM PIPES BELLMOUTHS | eBay Over the years and with different bikes I have heard different opinions, I would be interested to hear your opinions. The ones I linked to are quite expensive, there are cheaper ones that also make improvement claims. Some have said you would never notice the difference and others claim an improvement. Perhaps it is one of those small improvements that work well with 'other' small improvements to give an overall gain......
I had hrc ones along with a different air intake on my RR5 but couldnt say how much power was gained or lost as I got them and the pc all fitted at the same time.
