Stainless steel cap for O2 sensor adapter M18 x For closing the hole for removing ratio meter and meter steel P1.5 air-fuel A/F (stainless cap,

The center hole has been changed to accommodate an 8mm hex wrench. Stainless steel cap for O2 sensor adapter M18×P1.5 For plugging the hole for removing the air-fuel ratio meter and A/F meter. Stainless steel cap for O2 sensor adapter M18 x P1.5 For plugging the hole for removing air-fuel ratio meter and A/F meter