The kickport does not sound terrible installed in the factory head (my best guess is that the factory reso head is a coated Remo Power Stroke.)
Basically, it will make your factory head sound like a pre-muffled ported head (EMAD, EC3, Super Kick, etc).
There is a significant amount of low frequency resonance that I like however... I have been messing around with the tuning and right now and I have both heads about as loose as possible.
Performer 22, 12, 13, 16FT
Newport 22, 8, 10, 12, 14FT, 16FT, 6x14SD
Phonic Plus Gloss Black 22, 22, 8, 10, 12, 13, 14, 15,16FT, 18FT
Phonic Plus 508 Hi-tech
Premier XPK 20, 10, 12, 14