Radium Parallel Fuel Rail Plumbing Kit w/DMR RA Regulator - Subaru WRX 08-14/STI 08-21/FXT SH/LGT 07-14 (EJ20/EJ25)These plumbing kits are designed to compliment 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. Both kits are compatible with all Radium Fuel Rails for the Subaru EJ engines (excluding 20 0499 Fuel Rails). All necessary fittings and hoses are included, along with a RA Series FPR. RA series