Noble 3R Engine Upgrade

[CgOUCg]

Hi! I live in italy and here i am restored a Noble M12 GTO 3R. I have extract the engine and i would like upgrade engine power to 400-420 HP.
I will change the exhaust system, the fuel pump, the intercooler and i will upgrade the engine valve springs . Correctly? Recommended else?
Since I am not sure if my intercooler and my fuel pump them have already been changed in past, can you say me the size of standard radiator and the code of standard Fuel pump?

Thank to all and excus me for my bad english.

[CgOUCg]

ok thanks! And for the standard intercooler and fuel pump, how can i do for know if already changed?

[CgOUCg]

My exhaust system and collectors are damaged, then, i'am obbligate to change them. I thought to do change with after market and more powerful exhaust. (Piper or other).
My engine it was extract and i take this opportunity for replace some parts and toughen.
Also my turbos need to be restored, then i thought I would updating them. (It depends on spending).
I wood'nt like exaggerate with the ecu's map, for this i thought not to exceed 400 hp...
But if you tell me that with these changes I can push him over , I'll be happy to do it !
But.... pistons and connecting rods? They are affected ? Wich it is the limit? Need to be replaced with forged pistons?

[CgOUCg]

I found a company that builds me an exhaust system.
I can ask to make a diameter of 70mm?

[CgOUCg]

Hi! I return in this topic because i need to decide how to do.
Unfortunately, i need to restore totally chassis and now the budget for power upgrade is lower...
I would like arrive to 400-415 bhp without change the intercooler and with original T25 Turbos.
In the end, what is the best solution for this? Without spending too?

P.s. The exhaust is already in the production

[CgOUCg]

3R --> (3.0 355 bhp)

[CgOUCg]

Someone sells an original radiator?