6A12TT crankshaft upgrading

I need to know if 6A12TT stock crankshaft could be upgraded or not.

TQ

Upgraded to what?
6A13 run the same crank, these are hardened.
If you want a forged one you will be looking at around 2-3k UK pounds.

Shane: The cranks in the 6A13TT and 6A12TT are forged, not hardened =D

Yeah I've never seen a Mitsu crank that couldn't take everything you threw at it.