Oil Restrictor Adapter

Oil Restrictor Adapter are part of building a clean, leak-free AN plumbing system for fuel, oil, coolant and other fluids. The right fitting lets a line leave a port at the correct angle and size without stacking adapters, which keeps the system tidy and cuts down on potential leak points. Everything here is sized and listed so you can match it to your hose, hard line and ports. Every part in this collection is from Vibrant Performance.

What's in This Collection

  • 3 products from Vibrant Performance, priced from $25.50
  • AN sizes: -3, -4
  • Free shipping on orders over $150

How to Choose

Start with the hose or line size, then the port you are connecting to. AN sizes run in sixteenths of an inch, so -6 AN is 6/16 or 3/8 inch, -8 AN is 1/2 inch and -10 AN is 5/8 inch. Then match the other end: AN flare, NPT pipe thread, ORB with an O-ring, or metric. Pick the angle that points the line where it needs to go without a tight bend right at the fitting.

Common Questions

Do AN fittings need thread sealant?

No. AN fittings seal on the 37 degree flare, so sealant on the flare or threads is not needed. Only tapered NPT threads need a sealant.

What is the difference between AN and ORB?

AN fittings seal on a 37 degree flare. ORB fittings use straight threads and seal with an O-ring at the base of the thread, which makes them very leak resistant in ports.

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