Oil Restrictor Fitting -3AN x 1/8in NPT

The Oil Restrictor Fitting -3AN x 1/8in NPT from VIBRANT PERFORMANCE is a precision flow-control component designed for high-performance engine oil supply and return systems. This fitting serves as a critical safeguard in turbo, supercharger, and performance engine builds where excessive oil flow to bearings can cause pressure spikes, leaks, or bearing damage. Engine builders and enthusiasts rely on oil restrictors to regulate flow rates and protect sensitive bearing surfaces from over-pressurization.

Constructed from aircraft-grade aluminum with black anodized finish, the Oil Restrictor Fitting -3AN x 1/8in NPT delivers corrosion resistance and durability in demanding engine bay environments. The fitting features a -3AN thread connection paired with a 1/8-inch NPT port, allowing seamless integration into both metric and SAE-based plumbing schemes common in custom oil system routing. The hex head design accommodates standard wrenches for secure installation, while stainless steel internal jets precisely meter oil flow to predetermined rates, eliminating guesswork and ensuring repeatable, reliable performance across engine cycles.

This fitting is ideal for turbocharger feed lines, supercharger supply circuits, and high-output engine builds where bearing protection is non-negotiable. Professionals installing custom oil systems, rebuilding forced-induction engines, or upgrading stock lubrication setups will benefit from the precision flow control this adapter provides. The compact 3.55-inch length and lightweight 0.02-pound construction make it easy to position in tight engine compartments while maintaining structural integrity under continuous operation.