


Radium Toyota Air Assist Injector Seat, Single
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Description
Radium Toyota Air Assist Injector Seat, Single
Application: Toyota 2JZ-GE VVT-i, 1UZ-FE VVT-i, 3UZ-FE
Part Type: Air assist to top feed injector seat (single)
Part Number: 20-0516
The Radium 20-0516 Toyota Air Assist Injector Seat converts Toyota air-assist injector ports to suit standard top feed injectors. It is the same machined aluminium seat used in many Radium fuel rails and is needed when swapping OEM injectors for aftermarket injectors.
The seat press-fits into the intake manifold injector port with no modification. The included FKM O-ring seals the seat into the machined injector counterbore to prevent vacuum or boost leaks, and the bore is designed for a common 14mm lower injector O-ring.
Key Features
- Air Assist to Top Feed: Converts Toyota air-assist injector ports to standard top feed injectors
- Press-Fit: No intake manifold modification required
- FKM O-Ring: Seals the seat in the counterbore against vacuum and boost leaks
- 14mm Bore: Suits a common 14mm lower injector O-ring
- Billet Construction: CNC machined 6061 aluminium, black anodised, laser etched logo
What's Included
- Toyota air assist injector seat (x1)
- FKM O-ring
Important Notes
- Sold individually, not as a set – order one per cylinder
- Other engines may fit but have not been tested by Radium – compare your injector bores to the seat dimensions
- To install: clean any debris from the injector bores, lubricate the O-ring (O-ring lube, petroleum jelly or motor oil) and press the seat in until fully seated, using a small rubber mallet if needed
- Installation instructions are available in the Instructions tab
Vehicle Fitment
- Toyota 2JZ-GE VVT-i
- Toyota 1UZ-FE VVT-i
- Toyota 3UZ-FE
Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.

