AEM 25-108BK Black High Volume Fuel Rail Applications: 88-91 Honda Civic EX, Si D16 and 92-95 Honda Civic CX, DX, LX, EX D15 and D16 Applications: 88-91 Honda CRX Si D16 and 93-95 Honda Del Sol S, Si D15, D16 O.E. fuel pressure regulator or AEM adjustable fuel pressure regulator mounts directly to rail with no modifications Comprehensive installation instructions, hardware, fittings and injector O-rings included No additional parts required for installation