Since you are inquiring about a supercharger that already does not come with a filter then you must not be looking into the Rotrex where your only option then is the V3 style supercharger kit. That SC can not even get to 700whp with running a turboguard. The only dyno I have seen with the Soho intake filter is from soho themselves and they made 530whp or so with it.
The Rotrex has made 800whp with a filter for reference.
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