SKU: XRPIHP020
UPC: 803903299706
MPN: IHP020
The -20 ORB Internal Hex Port Plug Alum. - Black from XRP-XTREME RACING PROD. seals an unused O-ring boss port on fuel rails, tanks, manifolds and pump housings. The -20AN size handles the largest ports in the AN range, making it a common choice for high-volume fuel systems and forced-induction builds. Machined from aluminum and finished in black anodize, this plug installs into a straight-thread, O-ring boss port and seals on the boss face rather than the threads. If you have capped a port at the end of a circuit or blocked off an unused outlet, this is the fitting that does it cleanly.
An internal hex drive lets you torque the plug down with a standard Allen key, which keeps the profile low and avoids the wrench clearance problems you get with external hex caps in tight engine bays. The straight-thread O-ring boss design seals against an O-ring on the port boss, so it holds pressure without thread sealant or tape. The aluminum body keeps weight low at roughly 0.16 lbs and resists corrosion in fuel and oil service, and the black anodized finish matches the rest of a blacked-out plumbing setup. It carries MPN IHP020 under SKU XRPIHP020. For builders running a full system, we stock matching AN port plugs in other sizes and a wide range of AN fittings.
Reach for this plug when you need to block off a -20AN O-ring boss port that you are not using, whether that is a spare outlet on a fuel rail, a return port on a surge tank, or a manifold bung left over from a previous setup. The internal hex makes it easy to set torque in cramped spaces where a socket will not fit. Pair it with the right hose and ends from our AN hose selection, or browse the full fittings, hoses and valves category to finish out your plumbing.
It seals against an O-ring on the port boss, not the threads. The straight thread design pulls the plug down so the O-ring compresses on the boss face, which holds pressure without thread sealant or tape. Inspect or replace the O-ring before reinstalling for a reliable seal.
An internal hex drive keeps the plug profile low and lets you tighten it with an Allen key in tight spaces. External hex caps need wrench clearance around the fitting, which is hard to find in a crowded engine bay. The internal drive solves that without giving up torque control.
It fits a -20AN O-ring boss port, the largest size in the common AN range. Confirm your port is a straight-thread O-ring boss and not a tapered pipe thread before ordering, since the two are not interchangeable.
The plug seals with an O-ring at the boss. If your plug ships without one or the original is worn, fit a fresh O-ring rated for fuel and oil service before installing. A damaged or missing O-ring will leak even when the plug is torqued correctly.
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