Malibu M-Series/LT4 Pre-Cat (Upstream) O2 Sensor ns-medallion-std 00" thick in the bottom

00" thick in the bottom slot

CHEVROLET SMALL BLOCK EXHAUST MANIFOLD GASKET

chrome bezel

modern font

and a variety of o-rings

Malibu M-Series/LT4 Pre-Cat (Upstream) O2 Sensor ns-medallion-std 00" thick in the bottomLocation: In the exhaust manifold or header, before the catalytic converter Function: Monitors the oxygen level in exhaust gases before they reach the catalytic converter Sends data to the ECM to adjust the air fuel ratio for optimal performance, efficiency, and emissions Install Tips: Cool Engine First: Exhaust components get extremely hotwait until everything cools down. Disconnect Battery: Prevents accidental shorts while unplugging the sensor.