turbo is starting to smoke ... my 20vt has been mapped to 260hp i need a turbo with max 280-300hp and i want to take the cat off car has done 80k any help

If you're looking to increase power to 280-300bhp you'll need the supporting mods to match a stage 3 hybrid.

Talk to Flea

were and what sort of price do i get the turbo and what are the supporting mods i need

Flea can supply one of his power package turbos, they're tried and tested with great results so he's best to advise for costs.
Other supporting mods would be FMIC, 4 bar FPR, uprated fuel pump and wiring mod with a live remap.