Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery. Each Fuel Rail System provides a custom engineered installation solution. Featuring CNC-Machined Billet Fuel Rails and custom mounting brackets as well as all the necessary components and accessories required to perform a complete installation, in one box. Fits 2004-2006 Subaru 2.0L WRX - Return-Style System. Each Billet Fuel Rail System is comprised of: High Flow, CNC-machined, Billet Fuel Rails with custom, steel mounting brackets. Billet Adjustable Regulator or Fuel Pressure Sensor Adapter. All necessary ORB-Port fittings with O-rings, and Billet Aluminum, AN-hose ends. Stainless Steel braided fuel lines. Custom OEM fuel supply and return line adapter fittings, as required. For more information on the fuel rails, see the corresponding fuel rail kit for your applications.