Click here to download installation instructions (PDF)
Click here to download installation instructions (PDF)
These are the same machined aluminum injector seats used in Radium fuel rail kits. They are required when converting an OEM side feed injector to a top feed injector that uses a 14mm lower O-ring. They simply "pop" into the intake manifold (1 required per injector). They seal to the machined injector counterbore using the included Viton O-ring. The 2 sizes are based on the intake manifold's inside diameter of each injector counterbore. Below are just a few examples of some popular Nissan engines.
30mm = KA24DE S13/S14, SR20DET S13
25mm = RB25DET, SR20DET S14/S15, SR20VE FWD
All 30mm injector seats are black anodized. All 25mm injector seats (shown below) are Radium green anodized. 
The injector seats are CNC machined with a common 14mm bore for the lower injector O-ring.
FEATURES
-CNC machined 6061 aluminum
-Bright dipped anodized
-Laser etched logo
-Viton O-rings
INSTALLATION
Thoroughly clean out any dirt or debris found in the intake manifold injector seat bores. Next, lubricate the Radium injector seat O-rings with engine oil. Press the Radium injector seats down firmly into the intake manifold injector ports until fully seated. If necessary, use a small rubber mallet.