I will be dropping the B18C into my '97 HB in the spring. time to bone up on the electronics. I live in an area that has no emission testing ( eat your heart out Calif. ) therefore the CAT is useless. How do I eliminate the second O2 sensor, or should I install a "test pipe" with a fitting to accept the O2 sensor . What are my options? OBD2 all the way. I look forward to any and all sugestions.