Nitrous Express 16190 Billet Fuel Rail Adapter Late Model EFI 5/16 8mm Outlets

Vehicle Fitment

• Semi-Universal Fit - Compatible with late model return-less EFI fuel systems using 5/16 in. SAE or 8mm quick-connect fuel rail fittings

Fitment Notes

• Designed for return-less style EFI fuel systems with 5/16 in. or 8mm quick-connect fuel rail fittings - verify fuel line size before ordering
• Not compatible with 3/8 in. or 10mm fuel rail fittings - see PN: 16185 for that application
• Not designed for return-style fuel systems or vehicles with threaded AN fuel rail ports
• Straight (inline) outlet style - verify fitment clearance with surrounding components before installation

Features

• Billet aluminum tee-style adapter installs inline with the factory fuel rail - no cutting or drilling required
• Dual 1/8 in. NPT female threaded ports (top and bottom) support simultaneous nitrous feed and fuel pressure gauge connections
• 5/16 in. SAE female/male quick-connect design locks directly onto the factory fuel line without modifying OEM fittings
• High-flow internal design minimizes fuel restriction for reliable nitrous system delivery
• Black anodized finish resists fuel exposure and corrosion for long-term durability
• Installs in minutes with basic hand tools - no special equipment required

Specifications

• Part Number: 16190
• Adapter Style: Tee / Straight (inline)
• Inlet Connection: 5/16 in. SAE Female Quick-Connect
• Outlet Connection: 5/16 in. SAE Male Quick-Connect (inline pass-through)
• Gauge/Nitrous Ports: Two (2) x 1/8 in. NPT Female (top and bottom)
• Compatible Fuel Line Size: 5/16 in. SAE or 8mm quick-connect
• Material: Billet Aluminum
• Finish: Black Anodized
• Application: Late Model Return-Less EFI Fuel Systems
• Quantity: Sold Individually (1x adapter)

Included Components

• 1x Nitrous Express 16190 Billet Fuel Rail Adapter
• 1x -4 AN to 1/8 in. NPT adapter fitting
• 1x 1/8 in. NPT plug (for unused port)

Product Description

The Nitrous Express 16190 Billet Fuel Rail Adapter is a high-flow tee fitting designed to tap into late model return-less EFI fuel systems using 5/16 in. or 8mm quick-connect fuel rail fittings - with no cutting, drilling, or permanent modification required. It installs inline with the factory fuel line in minutes, providing two 1/8 in. NPT ports for simultaneously connecting a nitrous system fuel solenoid and a fuel pressure gauge.

Machined from billet aluminum with a black anodized finish, the 16190 is built to handle continuous fuel exposure in high-performance applications. A -4 AN to 1/8 in. NPT fitting and an NPT plug for the unused port are included. For applications using 3/8 in. or 10mm fuel rail fittings, see the Nitrous Express 16185 (straight), 16185-45 (45-degree), or 16185D (90-degree) variants.