AEM 25-103BK High-Volume Fuel Rail for 1999-2000 Honda Civic Si / Del Sol B16A

Vehicle Fitment

• 1999-2000 Honda Civic Si (1.6 L B16A2)
• 1994-1997 Honda Civic del Sol VTEC (1.6 L B16A3 / B16A2)

Features

• High-volume fuel rail with ½" bore for maximum flow
• Black anodized billet aluminum construction
• Pre-tapped ends for -6 AN or 9/16"-18 fittings
• Includes 1/8" NPT port for fuel pressure gauge or nitrous pick-off
• Comes with custom fitting for factory fuel line
• CNC machined for precision and durability
• Optimized to reduce backpressure pulses
• Supports extremely high power applications (up to ~1000 hp fuel flow capacity)

Specifications

• Part Number: 25-103BK
• Bore Diameter: ½"
• Material: Billet Aluminum
• Finish: Black anodized
• Ports: -6 AN or 9/16"-18 (pre-tapped), 1/8" NPT
• Warranty: 1-Year Limited
• Weight: ~0.7 lb (manufacturer spec sheet)

Included Components

• 1x Billet aluminum fuel rail (black anodized)
• Custom adapter fitting for OEM fuel line
• Injector O-rings
• End plugs / port plugs

Product Description

The AEM 25-103BK High-Volume Fuel Rail is built for Honda B16A engines in performance applications where high fuel flow is critical. With its half-inch internal bore, this rail ensures reliable delivery even under extreme demand, making it suitable for builds pushing high horsepower. The large bore also helps dampen pressure pulses, improving the consistency of fuel supply to injectors.

CNC-machined from billet aluminum and finished with a sleek black anodized coating, this rail has both strength and style. The ends are pre-tapped for -6 AN or 9/16"-18 fittings, giving you flexible options for your custom fuel system lines. An additional 1/8" NPT port is included for either a fuel pressure gauge or a nitrous setup. Installation is simple - it includes a custom fitting to attach to the factory fuel line, injector O-rings, and hardware.

Ideal for tuners and racers using Honda B16A2 / B16A3 platforms (Civic Si, Del Sol), this high-flow rail helps unlock the full potential of upgraded injectors and regulators. Backed by AEM's 1-year limited warranty, it's a reliable, performance-focused upgrade for high-horsepower and high-precision fuel delivery systems.