Depends on what you want........Jabba has 3 stages for the IHI...stage 3 kit comes with everything...exhaust manifold, turbo, 3'' downpipe, big injectors, upgraded fuel pump, new oil lines for turbo, fitting kit, induction kit, remap, boost controller etc...can't remember if FMIC is included or the cat.
Fitted you are looking at a minimum of £5k.
Stage1 has an adapter plate fo rthe exhaust manifold to allow fitment of IHI.
Can't remember of what Stage 2 is.
Check out the Jabba site for details or give them a call.
For stage3 at minimum boost you'll get approx 280bhp and 340bhp for max boost.
Having the internals done will see max boost power rise to approx 360bhp and 340+Nm.
The cost of having the internals done will easily double the final price....it's due to the amount of labour involved.
You can get a K03"S" replacement or an E05 which will give around 280bhp. Bear in mind though the E05 will require new oil pipes for turbo, 4BAR FPR, remap....it would also be wise to get a FMIC.