These plumbing kits are designed to complement Radium Engineering Subaru EJ fuel rail installations. Both kits interface with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. All necessary fittings and hoses are included, along with an adjustable high-flow fuel pressure regulator.
This fitting should always be mounted in the vertical upright position (shown below). In this condition, air flow is permitted to move through the unit in both directions (in and out).