Thats a question !
There’s many ways and mine wAs over many years and half of it by previous and there’s people on here can advise.
Depends how many mods you all really have but from Standard / Unmodified
£10000 + in parts and then Labour on top !
My car spec
Big brake kit with yellow stuff racing pads
Custom rear diffuser
Goopy apex seals
Oil pressure mod
Knife edged upper intake manifold
90mm rotary works throttle body’s
Link g4 + Ecu 2 map switch
Borg Warner wgt 8374 external gate t4 twin scroll
3 inch stainless v banded down pipe
Twin mvr 44mm wastegates plumbed back into downpipe in-line with exhaust flow
Rad tec vmount intercooler
Stainless steel intercooler pipes
Hks power exhaust
850 cc primary injectors
1680cc Bosch secondary with billet rail
Waldron in tank fuel pump
I’m also running aem water meth
When the water meth was fitted they welded into the greedy elbow which left bubbles of weld which eventually broke off and destroyed my rotors and housing.
I’ve just bought a new engine as it was cheaper that a rebuild form sliver firm performance , had the new engine street ported and all reinstall back to how it was , which has just cost me £8000 I’m just running the engine in at mo on a low powered map before taking it to wgt to have it retuned back to full power
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