ok got a 91 civic dx switchin to a d16y5 engine all i need to know is do i need to get the obd2 plugs to run this or just run my ol dizzy?

 

you need to use everything off your old engine. the wiring harness, old dizzy, old injectors, everything. makes it much easier

 

won't i lose power than with my ol ****?

 

Not unless it's broken. You must move all those things to the new motor to make it compatable with your ecu. The OBD2 distributor has different sensors, and won't work. The injectors are also different.

If you're worried about losing power, replace the ignition components with new OEM stuff to freshen everything up.