High Flow Fuel Rail With Skunk2 Grams Fuel Pressure Gauge for 12-15 Civic Si 9th Gen. This is the one of the cleanest fuel systems on the market. We drill and tap the fuel rail in house and preinstall a Black Grams (Skunk2) Fuel Pressure Gauge into the rail so that the High Flow Fuel Rail can be a direct bolt on for 9th gen Si.
