.... With the quad horn and stock filter 45 was the peak.
With the bike horn power jumped to 47.73.
With a ported bike horn 48.05 was achieved .
Surprizingly the cyclone gave the hp same results as the ported bike horn but torque was about a half a pound higher. So it seems there is a limit to flow with the stock airbox.
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getting a bit confused now, but it's all good. Were the plastics bolted on for these tests?.