RADIUM Engineering 20-0626 FUEL BRAKE LINE RETAINER KIT, Fits Nissan. EST, MON to FRI. FUEL BRAKE LINE RETAINER KIT, NISSAN. Since 2010, Radium Engineering’s goal has been to simply design and produce high quality aftermarket automotive performance products. Radium Engineering relies on a core team with a passion for innovation to lead the company toward advancement in the industry. All Radium products are carefully planned with thorough R&D and designed in-house using the latest computer simulation and modeling techniques. Extensive testing and evaluation ensures the performance of Radium products exceed consumer expectations. For these reasons, top motorsports competitors and enthusiasts worldwide rely on Radium Engineering products. Currently, Radium offers an expanding collection of motorsport parts and accessories for high performance and racing, focusing on their revolutionary fuel surge tank line and PCV oil catch can systems. A growing collection of application specific parts are also being created. Please contact Radium Engineering for more information.