whats the differnce, im am about to tune my jdm B16a and i got my p28 now i need my converison harness. which one do i get??

thanks

 

if you have a p28, and you have an 88-91 crx/civic si or crx hf, then you need the obd0 to obd1 conversion harness. if you have a crx/civic dx or std, then you are going to need an mpfi swap with your obd0 to obd1 conversion.

obd2a and b are for 96+ cars. you are running a 92-95 ecu in a 88-91, so you need to upconvert from obd0 to obd1. you are talking about a down conversion from the 96+ to the 92-95, which is wrong.