AEM High Volume Black Fuel Rail designed to support high‑performance applications up to 1,000 horsepower. Features a large 1/2" fuel bore to improve fuel flow and reduce backpressure pulses from larger injectors, while remaining compatible with stock injector sizes. Includes: • Additional 1/8" NPT port (for nitrous or fuel pressure gauge) • Custom fitting for factory fuel line • Pre‑tapped ends for -6 AN or 9/16"x18 fittings (for custom lines) Fits: • 1999–2000 Honda Civic Si • 1994–1997 Honda Civic del Sol VTEC Please confirm compatibility before purchase.