-9/-7 ( on e85) 2000cc injectors, 3+" full exhaust. Upgraded fuel pump(s), 3bar map sensor and haltech/vipec/link ecu. Link ecu would be cheapest.
This will net you 330(-7) to 360(-9) kw on 98 and you may crack 400(-9) if you go for e85. E85 would provide -5 power, without the lag. E85 also requires a ethanol sensor and fuel line upgrades.
TBH, I rekon see if you can go for drive/ride in a -5 and a -9 powered ride and see what suits you best.