The extruded rail features a large 0.69" internal diameter bore to suit even the most fuel hungry engines. They are CNC machined from a custom 6063 aluminum, media blasted, black anodized, and laser etched for a high quality surface finish. All 3 ports (2 end ports and 1 center port) are tapped with 3/4"-16 female threads (-8AN ORB), as shown below.

The Radium fuel rail converts the OEM side feed fuel injector setup to top feed, allowing the use of high flow fuel injectors (NOT INCLUDED). The fuel injector bores are 14mm ID. Note: Top feed fuel injectors designed for 11mm bores can be used by switching the top O-rings to 14mm style O-rings.

The kit is designed for specific upper and lower O-ring spacing, as depicted above. The included press-fit injector seats are designed for 14mm lower injector O-rings. Unlike others on the market, these seats include O-rings to prevent boost pressure leaks. They are CNC machined billet aluminum, anodized, and laser etched. Below are some of the many fuel injectors that are a direct fitment with this Radium fuel rail kit.

Here is a list of some of the more popular compatible injectors:
Injector Dynamics ID725-48-14
Injector Dynamics ID850-48-14
Injector Dynamics ID1000-48-14
Injector Dynamics ID1300-48-14
Injector Dynamics ID1700-48-14
Injector Dynamics ID2000-48-14 
Deatschwerks 17U-00-0050-4
Deatschwerks 17U-00-0060-4
Deatschwerks 17U-00-0072-4
Deatschwerks 17U-00-0095-4 
Deatschwerks 16S-12-2200-4 

The included anodized aluminum mounting feet secure the fuel rail to the intake manifold reusing the OEM thermal insulating spacers. Different height injectors can be used, but longer spacers and hardware may be required.

This kit is compatible with all fuel types including popular alcohol mixtures such as E85.

INCLUDED:

20-0215 Toyota 2JZ-GTE Fuel Rail: 
-Black Anodized Laser Etched Aluminum Fuel Rail
-Black Anodized Aluminum Mounting Feet
-Stainless Steel Mounting Feet Bolts (x4)
-20-0216-06 Toyota Injector Seat Kit, 6 Cylinder 

Fuel Pulse Damper(s)
Do I need pulse dampers? The opening and closing of the injectors creates pressure pulses in the fuel rail, which can lead to unstable fuel pressure. In order to achieve a safe and consistent rail pressure, a fuel pulse damper should be used (especially with high flow injectors). The internal diaphragm will absorb oscillation pulses and stabilize fuel pressure. This correction can be measured throughout the RPM range and can often help an erratic surging idle. 

When choosing fitting sizes will come with 3 fittings 2 feed and one return.