GM O2 sensor, what size are the threads?. 14mm is too small, 16 or 18?. Bruce Got 4 irons in the fire, two of which are about hot. ---------------------------------------------------------------------------- To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes) in the body of a message (not the subject) to majordomo@lists.diy-efi.org