Ur TD04 turbo will max out at 260whp. I was doing research on mod list for 330whp if my leak down test comes out good. Here is my list for you:
On ebay:
Kinugawa TD05h-18g, 7cm hotside --$950, Extra $120 for STS lightweight turbine wheel:
Kinugawa Billet Turbocharger Subaru Forester Impreza WRX 08 TD05H 18G 7cm | eBay
Rally sport direct:
Perrien TMIC
ID 850cc injector for 98, 1000cc for e85
AEM CAI
Perrin inlet hose
NGK one step colder spark plug
Cosworth low temp thermo stat
DW 265lph fuel pump for 98, 300lph for E85
AEM boost gauge
Aem oil pressure gauge
Grimspeed AOS
Grimmspeed boost solinoid
Total: $3550 after tax, shipping $250 (believe or not)
From ultrex:
EL header--$550
Plus HKS SQV with return kit --$350 from RHD japan