ok here's the thing i have a 2001 ls integra

mods:
crower 404's
dual valve prings
retainers
eagle rods
9.1 pistons
walbro 255 intank
450cc injectors
skunk 2 cam gears
FPR
hasportmounts

this is the think i want to go boost but i've heard that the 404's arent good for boost soe say the 403's are better i know i'll need bigger injectors sme help would be great and any advice kinda new to the forum ;x thnks in advance