Hex head plug for O2 bung, CNC machined from stainless steel ,1-1/8" OD, 3/4" hex with M18 x 1-1/2" threads x 1" overall length for sealing off O2 bung when not using a O2 sensor, or capping a O2 bung for tuning.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
