Eliminate that annoying check engine light for good. The CTS Turbo CEL Eliminator / O2 Sensor Spacer is a simple, effective solution for vehicles running a catless or high-flow catalytic converter downpipe. By repositioning the downstream O2 sensor, it prevents false lean readings that trigger P0420/P0430 fault codes — no tune required.

• Universal fit — compatible with standard M18x1.5 O2 sensor bungs
• Easy installation — bolt-on in minutes with basic hand tools
• Durable construction — machined from high-quality steel, built to withstand exhaust heat and vibration
• Clears CEL — eliminates check engine lights caused by downstream O2 sensor after cat delete or test pipe install
• No tune required — a cost-effective fix before committing to a full ECU calibration

Designed for enthusiasts who demand clean installs and reliable results. Pair with your CTS Turbo downpipe or any catless exhaust setup for a complete, CEL-free build.