My car is New Age, already got HKS air filter, HKS exhaust system,
so what's next step?

depends what yoou want to do and how much money you have to spend.

i would start here

cheers

big sinky

I want spend about 3k-3.5k

tt

TDO5 turbo(front entry)
walbro fuel pump
sti 7 intercooler and bonnet scoop
tubular headders with de-cat up pipe
de-cat downpipe
3port boost sol
tek3 remap by BRDevelopments

will be good for over 300

if you want more than 350 you will need-

set of sti 7 or bigger injectors
front mount intercooler instead of sti 7

hope this helps :)

Or for a just £800 go to p.e and get a TEK 2 ecu, i had mine done and i didnt mind paying the money .I went from 235bhp to 273bhp,thats excludeing my down pipe.Im getting my down pipe fitted on sunday so i cant wait to see what my final out-puts are like when i get my scoob tuned up on wednesday

chris