The fuel rail end ports are tapped for 8AN ORB and the center port is tapped for 6AN ORB.
Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.
The Radium Engineering fuel rails are designed for the 2013+ engine found in the Subaru BRZ (FA20D), Scion FR-S (FU-GSE), and Toyota 86 (4U-GSE). Manufactured with a large 0.69" internal bore, the fuel rail can support all necessary engine power requirements. The left/right rails are identical and feature anodized aluminum bodies and mounting brackets.
CONFIGURATIONS
20-0111-01 Fuel Rail Kit, FR-S/BRZ/86
All necessary parts are included to make this a direct bolt-on replacement for the stock rail. The kit includes billet aluminum adapters that allows the OEM fuel pulse dampers to be retained. Also included are two -6AN PTFE hoses which make this kit compatible with all fuel types including popular alcohol mixes, such as E85.
20-0111-00 Fuel Rail, FR-S/BRZ/86
This does not include hose or fittings.
20-0111-PK Fuel Rail Plumbing, FR-S/BRZ/86
The plumbing kit includes the items shown in the image below.
As a compliment, consider purchasing 20-0353 Radium ECU Mount. This prevents the need to cut the OEM steel ECU mount and permits easy access to the RH fuel rail.