Exchange FSA K-Force Light chainset with a SRAM RED I'm the lucky owner of a  Fuji SST 1.0 from 2010 (mounted with a Shimano press-fit bottom bracket). I would like to exchange the front chainset from a FSA K-force 53/39 to a SRAM RED 50/34. Can you help me to what bottom bracket I need to purchase and get fitted?
If you have the GXP Red cranks (more normal) you want a Pressfit GXP Bottom Bracket.

If you have the BB30 Red cranks you want a Pressfit 30 BB

However not all press fit systems are created equal. I would have your LBS check compatibility, and supply and fit a suitable part.

SRAM make both of these in the whole range of series from Red down to non-series Truvativ-branded versions.