Russell Performance -4 AN Straight Thread Plug (Blue)

When you're building a custom fuel system or need to seal off an unused port on your oil pump or fuel pump, a straight thread plug is what you'll reach for. This particular plug from Russell is designed to seal a -4 ORB (O-ring Boss) port, ensuring a positive seal even at high operating pressures. It's precision machined from lightweight 6061-T6 aluminum, so it won't add unnecessary weight to your setup.

The blue anodized finish not only looks sharp, complementing other blue anodized Russell components, but it also offers a bit of protection against corrosion. This plug features an external hex head, making it easy to install and remove with a standard wrench. It's a straightforward part, but getting the right fitting is key to a leak-free and reliable custom plumbing job.