Before making promises about collection, coordinate the inspection, paperwork, seller release and transport. Give each part of the purchase its own check.
An air-fuel ratio sensor (commonly Bosch LSU 4.9 or NTK UEGO) that reads accurately from 10:1 to 20:1 AFR. Replaces the narrowband sensor used by stock ECUs which only signals "rich vs. lean." Required for any tuned forced-induction build. Mounted in the exhaust collector or downpipe.
