18mm O2 Sensor Plug

The ALLSTAR PERFORMANCE 18mm O2 Sensor Plug is a precision-engineered oxygen sensor blocking solution designed for high-performance engine applications. Featuring an 18mm x 1.50 male thread with a hex head design, this steel component is finished in zinc oxide for corrosion resistance and durability in engine bay environments. It serves as a direct replacement or upgrade component for systems requiring reliable sensor port plugging during tuning, testing, or alternative fuel system configurations.

The zinc oxide finish provides extended longevity against heat cycling and moisture exposure, common challenges in engine compartment applications. The hex head design ensures secure installation and removal using standard wrenches, preventing cross-threading and allowing consistent torque application. At 0.14 lbs, the plug is lightweight without sacrificing structural integrity. The 18mm x 1.50 thread specification aligns with factory oxygen sensor boss dimensions on many domestic performance platforms, making it a direct fit for vehicles undergoing emissions system modifications or sensor elimination procedures.

This component is essential for engine builders, performance shops, and tuners working with forced induction, alternative fuel systems, or ECU tune-ups that require temporary sensor isolation during calibration. The steel construction combined with zinc oxide protection ensures the plug maintains its integrity through repeated thermal cycles and seasonal storage. Technicians and enthusiasts rely on ALLSTAR PERFORMANCE's precision threading and finish quality to eliminate guesswork during installation and prevent port damage that could compromise future sensor reinstallation.

ALLSTAR PERFORMANCE is a recognized supplier of engine components and fasteners to the racing and performance automotive community, with a reputation for holding tight tolerances and delivering reliable hardware for high-temperature environments. The 18mm O2 sensor plug represents the precision standards expected from the brand, making it a trusted choice for professional and amateur builders alike.