60lb injectors,
Bosch 044 fuel pump,
Valve springs,
Ported turbo housing & Flapper mod,
3" dump pipe,
3" exhaust with Hi-flow CAT,
and CUSTOM (on dyno) tune!

...this may see you making 300+ rwkw, depending on whether your XR6T is a BA or BF.

This^^

But dont bother with the 3" exhaust. twin 2.5" or a 3.5". And if you dont want to run an external fuel pump and surge tank go a warlbro or a 023 pump.