When a high-flow catalytic converter, such as those that come with aftermarket exhaust systems, is used on a late model car its common to see a CEL (Check Engine Light). This CEL is usually backed by a fault code that indicates a failed cat. The factory ECU is comparing the readings from a pair of oxygen sensors to measure the effectiveness of the cat. When a high-flow cat is used the exhaust gases are able to pass by the cat at a much faster rate, disrupting the readings. This O2 sensor spacer retracts the second oxygen sensor from the direct flow of gases, restoring the balance that the ECU requires when using a high-flow cat.

The 42 Draft Designs O2 Sensor Spacer is CNC machined from cold roll steel & grade 8.8 metric hardware. After assembly, it undergoes a zinc dichromate plating process which protects the spacer from corrosion. Installation is plug & play. Simply thread in the spacer, thread in the rear o2 sensor, and lock the spacer at the desired angle.

Strictly for use with a 49 state legal aftermarket high-flow catalytic converter.
This product is not intended to and will not provide emissions compliance.
Emissions laws vary by state. Check local and federal laws before modifying your exhaust system.
Emissions compliance is the sole responsibility of the vehicles owner.