Back Pressure Transducer BPT Valve EGR 280Z 280ZX OEM

New Genuine Nissan BPT (Back Pressure Transducer) valve.  This part mounts on top of the intake near the EGR valve and works with the EGR valve.  The BPT valve appears to have come on 1978 and 1979 280Z and ZX cars (maybe 77 as well).