Universal 2 pack M18x1.5 oxygen sensor spacer adapters for O2 sensors. These spacers extend or adjust sensor position to fit aftermarket exhaust components, reduce contact with heat shields, and help maintain accurate readings. Key features - Fit: Universal for O2 sensors with M18x1.5 threads; includes two spacers. - Size: Thread size M18 x 1.5 on the connecting ends. - Function: Creates proper clearance between the sensor and exhaust pipe or catalytic converter, reducing risk of damage and misalignment that can trigger a check engine light. - Benefit: Simple installation, preserves sensor alignment, supports reliable readings after exhaust changes, cost effective. Compatibility and installation - Compatible with most M18x1.5 O2 sensors. - Quick, tool-friendly installation; no sensor replacement required. Use scenarios - Aftermarket exhaust or header upgrades where sensor position shifts and extra clearance is needed. - Relocating or extending sensor reach without stressing wiring or components. - Preventing interference between the sensor and new heat shields or other exhaust parts during upgrades. This kit provides a practical, installer friendly way to adapt sensor position, maintain performance, and minimize diagnostic issues after exhaust changes.