As this says to get a genuine 230bhp from the K03s just having one isn't enough, you will prob need a new Fuel Pressure reg, a new N75, prob the F version, an FMIC and a high flow exhaust, with these and and a remap you would prob be closer to the figure you were/are hoping for.
Originally Posted by Tallpaul
and to see a genuine 230bhp from a K03s you're gonna need a FMIC too.
2nd Hand K03s £250
Fitting Kit £50
Forge TIP £120
4bar FPR £30
N75(F i think) £40
FMIC £250 - 750 (depending on the quality of core you choose)
Labour to fit above 4 - 5 hours @ £45/hour (not inc fitting the FMIC, that's a DIY or it'll cost another few hours labour).
High Flow DP and Race CAT £400
Total: about £2000 for a genuine 230bhp/250lb_ft