Quote Originally Posted by Tensa_Zanget
the converter is from magnaflow which i ordered online and is universal:
Inlet/Outlet Size: 2.5"
Overall Length: 13"
Body Length: 9"
Width: 6 1/2"
Height: 4"
OBD 1 & 2 Approved!

As for the the catback i got a skunk 2 mega power specifically for a 88-91 crx (d series)used. So i took it to muffler shop to get some flanges and get it custom since the header is from a b series and the catback is from a d series.
The converter is too large for that engine as far as emissions go. If you can get it to pass with the same converter, it's gonna have to be from the lowest gear allowed. The cat isn't flowing enough gas from that 2.0L at those engine speeds for it to work properly. Your best bet is to retard the shit out of the timing and retry. If that don't work, you need to install a smaller converter, possibly a 2 inch converter, 2.25 max.