Site Information

 Loading... Please wait...
  • Image 1
  • Image 2
  • Image 3
  • Image 4
  • Image 5
  • Image 6
  • Image 7

Radium Top Feed Fuel Rail for Nissan SR20DET S13

0 Star Rating

Buy in bulk and save


This Nissan Silvia/180SX/200SX fuel rail kit is designed specifically for SR20DET S13 style intake manifolds, including the GReddy manifold. It features a large 0.69" internal diameter bore to suit even the most fuel hungry engines. 

The rail is CNC machined from solid 6061 aluminum and black anodized for a high quality surface finish. The included hardware mounts the fuel rail to the OEM intake manifold bosses.

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. Different height injectors can be used, but longer or shorter spacers and hardware may be required. Below are some of the many fuel injectors that are a direct fitment with this Radium fuel rail kit.

To resist oxidation corrosion, the lower billet aluminum injector seats are anodized and laser etched. They are O-ring sealed and designed for 14mm top feed injectors.  This kit is compatible with all fuel types including popular alcohol mixtures such as E85.


All parts listed below are included for a trouble and leak-free installation.

-Black Anodized Aluminum Fuel Rail
-Radium 20-0160, Black Anodized Aluminum 30mm Injector Seats (x4)
-Stainless Steel Mounting Brackets (x3)
-Stainless Steel Mounting Bolts (x6)

NOTE: This fuel rail kit does NOT come standard with fittings (see port configurations below).


The rear inlet port uses 3/4"-16 female O-ring port threads to accept -6AN, -8AN, or -10AN adapter fittings for custom high flow fuel system builds. The front port uses 3/8" NPT female threads which permits the use of our fuel pulse damper, a -6AN or -8AN adapter, or a billet adapter to reuse the stock FPR. The top port has 1/8" NPT female threads commonly used for a fuel pressure gauge (or sensor) or can be plugged. On the bottom of the fuel rail there is another 3/8" NPT port for a -6AN or -8AN center port, pulse damper, or it can be plugged. 

Use the optional check boxes above and the diagram below to select the appropriate port configuration for your specific application. If nothing is required, simply do not check any boxes.

Do I need a pulse damper?
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 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. The fuel pulse damper can be used in either 3/8" NPT port. 

Radium Engineering Products are made in the USA.


This product hasn't received any reviews yet. Be the first to review this product!

Write Review