NPT Reducer 3/4-3/8

The NPT Reducer 3/4-3/8 from Triple X Race Components is a precision aluminum bushing fitting designed to adapt 3/4-inch NPT male connections down to 3/8-inch NPT female ports. Black anodized for corrosion resistance, this compact reducer solves a critical plumbing challenge in high-performance engine systems, fuel delivery lines, and hydraulic applications where port size mismatches would otherwise require custom fabrication or system redesign.

Weighing just 0.07 lbs and measuring 2.25 x 1.4 x 3.15 inches, this fitting delivers the flow characteristics and thread sealing integrity required in racing fuel systems, cooling circuits, and pneumatic lines. The NPT (National Pipe Thread) tapered design ensures a mechanical seal without additional tape or sealant—critical in applications where vibration and thermal cycling demand absolute reliability. The aluminum construction provides weight savings without sacrificing thread durability, while the black anodized finish resists corrosion in engine bay environments exposed to fuel, coolant, and moisture.

This reducer addresses a common sizing issue in race engine builds: mismatched port sizes between OEM components, aftermarket fuel rails, water pumps, and remote filter housings. Rather than sourcing custom fittings or modifying existing ports, builders can install this standard bushing to maintain consistent 3/8-inch female connections throughout their system. The compact profile fits tight engine compartments and custom chassis layouts where space constraints limit fitment options.

Triple X Race Components specializes in precision adapter fittings and plumbing solutions for racing and high-performance engine applications. This NPT reducer is stocked as a single unit for builders who need to resolve one port mismatch or stock multiple units for complex fuel and cooling system builds.