Just to confuse the matter further....I have been running an original versaplug max with no flapper on my Superfreak Badass since 2012 with no exhaust sucking issues. I also switched to a rrp pole from an xmetal at some point and completely closed off my hood breathers with no performance loss...
Probably fine especially if you ride cold water but the dual cooling isnt so much about more water to the engine and pipe. It's more about safety of having redundant cooling lines in case one gets clogged.
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