1/8 x 3/8 Pipe Reducer Bushing Black

The 1/8 x 3/8 Pipe Reducer Bushing Black is a precision hydraulic and pneumatic adapter designed for mechanics and fabricators who need reliable flow management in tight spaces. This FRAGOLA reducer bushing converts larger 3/8 inch NPT male ports down to smaller 1/8 inch NPT female connections, making it essential for downsizing fuel lines, coolant passages, brake systems, and compressed air circuits in custom engine builds and performance modifications. Whether you're consolidating manifold ports on a LS swap, recirculating vapor recovery lines, or adapting legacy plumbing to modern components, this compact fitting delivers the step-down capability professionals demand.

Machined from aluminum and finished in black anodized coating, the 1/8 x 3/8 reducer bushing resists corrosion while maintaining a clean engine bay aesthetic. The NPT (National Pipe Thread) tapered design creates a metal-to-metal seal that eliminates reliance on PTFE tape in most applications, allowing it to handle pressurized systems up to standard automotive specifications without thread sealant leakage. Its compact 1.2 x 1.1 x 4.35 inch footprint fits into cramped intake manifolds and cylinder head ports where larger fittings cannot, while the anodized finish protects against oxidation in both wet and dry climates—critical for underhood longevity.

Engine builders, hot rodders, and restoration specialists rely on FRAGOLA reducer bushings to consolidate accessory ports during engine swaps, LS conversions, and turbocharger installations where port count and spacing demand flexible routing solutions. This bushing is compatible with any system using standard NPT female and male threads—fuel pressure gauges, catch can drains, heater hose adapters, and vacuum distribution blocks all benefit from this step-down adapter. Installation is straightforward: hand-tighten with NPT wrench engagement and verify seal integrity under pressure before full operation.