D Series Fuel Rail Civic Si SOHC For Skunk2 Manifold Fpr Gauge Line Hose 3 Bolt. Will only work on SOHC Civics with Skunk 2 intake manifold. Or any intake manifold that has 3 bolts to attach the fuel rail to the manifold! High Flow Fuel Rail, Fuel Pressure Regulator, and Fuel Pressure Gauge. OE fuel pressure regulator or adjustable fuel pressure regulator mounts directly to rail with no modifications. 1/8th NPT port is included to accommodate a nitrous set up or a fuel pressure gauge. 1/2 fuel bore to support fuel flow for applications up to 1000 horsepower. A custom fuel line fitting is included for the factory fuel line and the ends of each rail are tapped to accept -6 AN or 9/16 x 18 fittings for users who want to use custom fuel lines. Made From High Quality Black Anondized Aluminum. 1x High-Flow Fuel Rail Kit (100% Brand New Never Used Or Installed). 1 x Fuel Pressure Regulator Kit. 1 x Fuel Pressure Gauge. Includes ALL Hardware As Pictured.