Just to clarify the theory.
4th order bandpass bass box theory has nothing to do with intake resonance.
In speaker terminology 4th order refers to the number of reactive elements in the system that produce a very high rate of slope ( amplitude reduction ) each side of a chosen frequency.
But in an intake system when we are talking about the harmonic " order " this is the fundamental frequency of the intake ( dictated by rpm/60=Hz ) divided by the number of times
the active wave traverses the tuned length.
Anything over the 3rd harmonic has so little energy it is pretty much useless, but the correct tuned length for lower orders ( although higher in amplitude ) usually make the intake way too long to actually fit on an engine.
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