#8 Straight Thread Plug

The #8 Straight Thread Plug by XRP-XTREME RACING PROD. is a precision-engineered AN fitting designed for high-performance fuel, oil, and coolant systems in race engines and heavily modified vehicles. This aluminum plug is essential for closing off unused AN ports on your manifolds, fuel rails, and custom-built hydraulic circuits. Whether you're building a competition engine or executing a complex fuel system upgrade, this fitting provides a reliable, leak-free seal that meets the demands of motorsports-grade plumbing.

Constructed from lightweight aluminum with blue anodized finish for corrosion resistance and visual identification, the #8 Straight Thread Plug features an O-ring seal that maintains system integrity under pressure and temperature cycling. The hex head design allows secure installation and removal using standard wrenches, preventing accidental loosening during engine vibration or high-rpm operation. The straight-thread configuration (AN 8 standard) ensures compatibility with all industry-standard AN fittings, and the O-ring interface eliminates the need for thread sealant, reducing installation time and the risk of contamination in fuel and oil systems.

Mechanics and engine builders rely on these plugs when test-fitting fuel system layouts, capping overflow ports on custom fuel pressure regulators, or sealing off unused ports on aluminum intake manifolds. Lightweight at just 0.06 lbs, each plug is ideal for weight-conscious race builds. Installation is straightforward—thread directly into any AN 8 female port and tighten with a wrench until the O-ring compresses for a solid seal. Stock one or more in your shop for emergency fittings, prototype builds, or as a spare for track events where system modifications may be necessary.