what gears do you have??? what current mods??

also look into a progressive controller, a valve body for your trans (factory tech or transgo), I'd run 39# terminator cobra or 42# lightning injectors with a 255lph in tank or a T-Rex boost-a-pump a 90mm MAF and then port the TB elbow and get a 75mm TB and you be much happier



then will come headers, forced induction and built motor and trans

 

I've been running a similar Zex kit on my Integra for over 3 years now. It was $500 but that kit you posted says its designed for truck applications so maybe thats where the price difference is. Shop around.
I'm also using their purge and bottle opener, everything works great. Their bottle warmer is garbage though.