AEM - High Volume Fuel Rail for 99-00 Honda Civic Si - 25-103BK

The AEM High Volume Fuel Rail 25-103BK is designed to deliver consistent, high-capacity fuel flow for applications producing up to 1000 horsepower. Precision CNC-machined from billet aluminum and finished in a sleek black anodized coating, this fuel rail offers exceptional durability, corrosion resistance, and reliable performance in both street and racing environments.

Its large 1/2-inch internal bore provides smooth fuel delivery while dampening backpressure pulses caused by high-flow injectors, ensuring stable fuel pressure and improved injector performance. The rail includes a custom fitting to connect directly to the factory fuel line and is pre-tapped for -6 AN or 9/16"x18 fittings to accommodate custom fuel system configurations.

An integrated 1/8-inch NPT port allows for easy connection of a fuel pressure gauge or nitrous setup, adding flexibility for tuning and monitoring. Each kit includes detailed installation instructions, fittings, hardware, and injector O-rings for a complete, ready-to-install solution. The 25-103BK combines precision engineering with practical installation options, making it a trusted upgrade for enthusiasts seeking improved fuel delivery and system reliability.

Features:

• Supports fuel flow for applications up to 1000 horsepower

• 1/2-inch internal bore dampens backpressure pulses for smoother injector performance

• Installs using the supplied fitting for factory fuel lines — no additional parts required

• Pre-tapped ends accept -6 AN or 9/16"x18 fittings for custom fuel systems

• Includes 1/8-inch NPT port for a nitrous pickup or fuel pressure gauge

• CNC-machined billet aluminum construction with black anodized finish

• Comprehensive kit includes fittings, hardware, and injector O-rings

• Manufactured and assembled in the USA

Fitment: 
1994 Honda Civic del Sol VTEC
1995 Honda Civic del Sol VTEC
1996 Honda Civic del Sol VTEC
1997 Honda Civic del Sol VTEC
1999 Honda Civic Si
2000 Honda Civic Si