Metric Port Plug M16 x 1.5

The Metric Port Plug M16 x 1.5 from VIBRANT PERFORMANCE is a precision thread adapter designed for engine builders, tuners, and performance mechanics who need reliable port sealing solutions on metric-threaded engine blocks and manifolds. Whether you're customizing a fuel injection system, relocating sensors, or capping off unused ports during an engine rebuild, this metric port plug provides a clean, leak-free closure without compromising structural integrity or airflow characteristics. Built for professional-grade installations, it eliminates the need for improvised stoppers or thread sealants that can degrade under high temperature and pressure cycling.

Engineered to ISO metric specifications, the M16 x 1.5 threading ensures a precise fit on standard metric ports found in European and import engine platforms, including common BMW, Audi, Volkswagen, and Subaru applications. VIBRANT PERFORMANCE manufactures this plug from robust materials capable of withstanding engine bay temperatures and vibration without loosening or seizing. The compact 0.75-inch outer diameter accommodates tight engine bay layouts typical of turbocharged and forced-induction builds, while the full-depth thread engagement prevents stripping and ensures consistent clamping force across multiple installation cycles.

This metric port plug is essential for anyone performing custom fuel rail relocation, turbocharger plumbing modifications, or sensor integration on metric-threaded engine platforms. Installers benefit from the standardized M16 x 1.5 pitch, which eliminates guesswork and cross-threading risk when working with unfamiliar metric systems. A single plug weighs just 0.01 lbs and fits easily into a toolkit, making it ideal for mobile tuning shops, race shops, and dedicated home garage builds. Pair it with Vibrant Performance's complete lineup of adapter fittings and manifold components for seamless custom engine modifications.