1.Colder air or change to bigger intercooler cos air wil be
denser...
2.Tis ah...No comment...depends lah....
3.Get HKS mayb better?
4.Er...well...got differance, mayb few degree to "advance" it
lor...
5.Tis not bad, got friend use..but run in took him 1 week to get
best performance...he say, i dunno...
6.Got Blitz also mah...
7.Er...tis i dunno..sorry.
.Put final-drive(Travelled
longer distance wid same rev)
.Change injectors....(more"c.c or ml" more
oil mah...)
Put Cam(It pulls the rpm faster)
Can be chip or turbo(If chip better get
those not"DEAD" chips,save for futher upgrade.if turbo, u may need
big intercooler as wat i write at 1.Al tis is of cos u got good
foundations inside ur vehicle already if not, u put liao..true
la,,very fast, but how long can ur car take it..get my point..

Haha,where got simple mod, (No offence)te way i see mayb i know wat
u wan...no need win rex cos gearing diff mah...BUT...if can glue to
rex starting from stop 1st,2nd,3rd gear already
RIGHT?!?!?!?!hahahaha...if my vehicle can do it...
....but which cannot...sigh
on a day i damm "tu lan"after magnet
to it from 1st to 3rd gear,best is if got traffic light place, next
traffic light, slow down beside te rex den say..hmmmm u driving a
TS???? lolxx..(No Offence to ppl tat drive rex, jus joking only
nia..pai say pai say)
If ur honda really fast till can glue STI....den u ask te driver,
"Hallow, ur "impreza TS" put the rear wiper how much har?Look lik
real 1 lea... 
Haha, dunno if u tink this way, but tat wat i tink....lolx.Even if
my max speed at 160km/h but pulls lik rex,tat feeling.....i'm
contented

1 very important point...BRAKES!!!!!
Change Rotors to crossdrill & slotted..better if got the 4 or 6
pot caliper..cos u can be super fast but cun stop in time..no
point..Lastly i feel is hv better tires tat will stick to
ground...)