3/8in Push on EFI to 3/8 NPT - Black

The 3/8in Push on EFI to 3/8 NPT - Black adapter is an essential fuel line component for modern EFI (Electronic Fuel Injection) engine builds and retrofits. This fitting bridges the gap between push-on style EFI hose barbs and NPT (National Pipe Thread) threaded ports commonly found on fuel rails, regulators, and distribution blocks. Whether you're upgrading a carbureted engine to fuel injection or customizing a modern platform, this adapter ensures secure, leak-free fuel delivery with the reliability demanded by performance and street applications.

Manufactured by REDHORSE PERFORMANCE, a recognized leader in fluid transfer components, this 3/8-inch adapter combines precision engineering with durable black finish for both corrosion resistance and professional appearance under the hood. The push-on end accepts standard 3/8-inch EFI hose with a secure mechanical grip, while the 3/8 NPT threaded side screws directly into fuel system ports without requiring additional fittings or adapters. The compact design—measuring just 2.85 by 3.85 inches—fits tight engine bays and custom plumbing layouts, and at 0.065 pounds, adds negligible weight to your fuel system assembly.

This adapter is ideal for enthusiasts performing EFI conversions on classic cars, hot rods, and swap projects where original NPT-threaded fuel components must interface with modern push-on EFI hose standards. Installation is straightforward—hand-tighten the NPT end into your fuel rail or regulator port, then slide your fuel hose over the push-on barb and secure with a stainless hose clamp. Proper sealing requires thread tape or sealant on the NPT threads to prevent weeping; always perform a pressure test after installation to confirm integrity before starting the engine.