FMIC to Turbo Options

Ive got a FMIC the piping is all stainless steel and 2.5" Internal diameter. I have a standard turbo but i need to know my options on how to join the FMIC piping to the turbo. Ive cut down the original turbo intercooler pipe, So i could fit a reducer but the OD of the stock pipe is 42-44mm in diamter and the OD of the stainless steel FMIC pipe is 62mm.
What do most people do as i belive everyone probably has this issue.
 
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