probably a stupid question but....
 

ok i dun wanna seem ignorant but what is completely necessary for a turbo system????? im trying to get everything together and just whanna no. from piping to electronics its gonna go on a b series in a eg6. any help is greatly apprieciated. i wanna keep it quiet so 3 inch exhaust is out of the question lol thanx:smokin:

Turbo'd engines are quieter than naturally aspirated engines. You will need the 3inch exhaust or else you will be robbing yourself of power. Turbo back, not just catback.

Turbo, manifold, oil/water lines, wastegate if needed, intercooler, intercooler pipes, new air intake piping/filter, oil cooler would be good, fuel system (injectors, fuel pump, lines/filter are optional, fuel pressure regulator), and for electronics either piggy backs like hondata or a full EMS system like AEM.

Don't expect a GOOD reliable setup to be under $5000. Looking closer to $10000 if you are building the block/head.

A 2.5" exhaust is big enough for a turbo Honda, but as mentioned above you'll need a full 2.5" exhaust system from the turbine housings to the muffler tip.

B16s are good for 300hp apparently.