or insted of jamming 4 #4's in there why dont you get your self 2 tunze 6060's
flow is one of the most inportent things.... dont go cheap, dont geto rig, dont skimp.
you will thank your self in the months 2 come....
i have a koraila pump i bought just 2 see how it comepairs.. and i must say, its bin siting on the self for about 3 months.
ill never waste my money again,