I'm doing some research to turbo my 5sfe and saw that some other forums said the exhaust manifold on the 3sge and 5sfe engines were the same. I was wondering if this was correct and if I would run into any problems throwing a 3sge turbo on my 5sfe motor. Any info?

youre good, they are the same boltable but the difference is repiping the rest of the exhaust system.

Keep in mind the 3SGE manifold is a two-piece, and unfortunately it is often advertised as the 3SGE manifold but sold only with the 4-2 section. You then either have to source another 2-1 section or have it made. Then, as trdproven noted, the rest of the exhaust is different. Main concern is the mid-pipe, where you have to locate a catalytic converter and a resonator, as well as a flex pipe.