[jimjr21]

Without seeing the inside of the muffler it is hard to determine the restriction that it has. The outside shape looks like it would have a single bypass design.

Airbox is a nice large. The opening may be adequate. Will have to put it on the flow bench and test it. Design also looks good to remove water from intake.

I am not a fan of the foam type filters. Too easy to choke the air flow with excess oil.
How thick is the filter? Can find a standard K&N to drop in there if there is enough space.