Radium Engineering Injector Seats Nissan 25mm / 30mm

Radium Engineering Injector Seats - Nissan - 25mm / 30mm

Radium Engineering produces precision fuel system components used by professional motorsport teams worldwide, and these injector seats are built to exactly that standard. Machined from billet aluminium and CNC finished in the USA, they give Nissan engine builders a clean, reliable solution for converting OEM side-feed injector ports to a top-feed configuration — opening the door to a far wider range of injector options.

This listing covers the Radium Engineering injector seat in two sizes: 25mm (green anodised, SKU 20-0161) and 30mm (black anodised, SKU 20-0160). Items are sold individually — order one per cylinder to suit your engine. Select your required size using the variant selector above.

Note: These seats are designed for Nissan intake manifolds with an existing OEM side-feed counterbore. Confirm your manifold bore diameter and injector lower O-ring size (14mm) before ordering.

Key Features

• Converts OEM side-feed injector ports to top-feed configuration
• Press-fit design — installs directly into OEM manifold counterbore with no machining required
• Built to the same specification as Radium Engineering fuel rail kits
• Compatible with standard 14mm lower injector O-ring
• Includes FKM O-ring for a sealed, leak-free installation
• Precision CNC machined from billet aluminium
• 25mm — green anodised finish (SKU: 20-0161)
• 30mm — black anodised finish (SKU: 20-0160)
• Fully rebuildable and serviceable
• Sold as singles — typically 4 or 6 required per engine

Part numbers, size options, and further fitment notes are provided in the tabs above. Confirm your manifold configuration and injector sizing before ordering.

Not sure if these injector seats suit your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.