I have a 98 accord coupe i4 AT

wanting Venom 400, i could get one for $270 shipped, do you guys think its worth the money? and if i do get it about how much should i except from it(hp)?

mod's
AEM short ram intake
DC sport 4-2-1 header (stainless steel)
Greddy Evo catback
NGK plugs
MSD plug wires

should i get it or not? or do something else with the money?