I want to get a Hondata s200 for my 99 civic si, and was wondering if i should get the chipped p28 hondata ecu where no conversion harness is required, or should i just get the conversion harness, and is b16a an OBD2-a or OBD2-b??

 

i'm not sure about the A or B, but personally I'd get one that's setup already for your obd2 harness. Less clutter, less to mess with under the panels if you can avoid the additional harness.

 

Either or it doesnt matter or hender peroformance.

there both good to do so you choose.