I have a 96 civic with a b18b1 swap. My speedometer is not moving at all. Could it be the speed sensor? I also need a Catalytic converter but I'm confused as to which kind to buy. I have a Spec'D Tuning Catback exhaust system for a Civic and M2 performance headers for b series. But i need a Catelytic converter and have no idea where to get one. Any suggestions?