OEM Toyota 3RZ / 2RZ Fuel Injection Spacer Cups – Injector Bucket Holders with O-Rings

Part Type: Fuel Injector Spacer Cups / Injector Bucket Holders

OEM Toyota Part Numbers: Spacer Cup: 90561-10018  |  O-Ring: 90301-19006

These OEM Toyota fuel injection spacer cups (injector bucket holders) are designed for Toyota Tacoma, 4Runner, and T100 2.7L engines. Installed in the cylinder head, these components properly position and seal the fuel injectors for correct operation.

Trusted by engine builders and installers for reliable fitment and performance.

These Toyota 3RZ fuel injector spacer cups (also known as injector bucket holders or injector seats) are commonly replaced when servicing or installing a cylinder head on Toyota Tacoma, 4Runner, and T100 2.7L engines.

Includes a complete set of 4 spacer cups with O-rings (one per cylinder).

Fits the Following Vehicles

• Toyota Tacoma 2.4L / 2.7L (1995–2004)
• Toyota 4Runner 2.7L (1996–2000)
• Toyota T100 2.7L (1995–1998)

Description

These Toyota 3RZ fuel injector spacer cups install directly into the cylinder head and hold the fuel injectors securely in place while maintaining a proper seal.

Each engine requires a full set of 4 cups. These are genuine OEM Toyota components designed to meet factory specifications for proper injector alignment and sealing.

Designed to meet or exceed OEM specifications, these components provide reliable injector sealing and long-term durability.

Direct OEM fit – no modifications required.

These components are commonly replaced during cylinder head installation or replacement.

Also Known As

• Injector spacer cups
• Injector bucket holders
• Fuel injector seats
• Injector cup inserts

Why Replace Injector Spacer Cups?

Over time, the original plastic spacer cups can become brittle due to heat cycles and age. They often crack or break during injector removal.

Common Problems Caused by Worn Spacer Cups

• Improper injector seating
• Vacuum leaks
• Fuel delivery issues
• Engine misfires

Replacing these components ensures proper injector fitment and reliable engine performance.

When Should You Replace Them?

It is highly recommended to replace injector spacer cups when installing a new or remanufactured cylinder head.

Old cups often become brittle and may not reseal properly once removed.

This is especially important when installing:

• 4 port cylinder heads
• 8 port cylinder heads
• Water pump

Features

• Genuine OEM Toyota components
• Includes O-rings for proper sealing
• Fits 2RZ 2.4L and 3RZ 2.7L engines
• Direct fit replacement
• Ensures proper injector alignment
• Helps prevent vacuum leaks

Installation Notes

• Install with light lubrication on O-rings
• Press evenly into cylinder head
• Ensure injectors seat properly after installation
• Replace all 4 cups as a complete set
• Do not reuse old brittle spacer cups
• Recommended when replacing cylinder head or injectors

Recommended Supporting Parts

• Use with a new upper head gasket set
• Install with new head bolts
• Often used with complete engine builds such as: Toyota 3RZ 2.7L Remanufactured Engine

Frequently Asked Questions

Do I need to replace injector spacer cups?
Yes. These often become brittle and break during removal, especially on high-mileage engines.

Can I reuse old spacer cups?
It is not recommended. Reusing old cups can lead to vacuum leaks or improper injector seating.

How many spacer cups do I need?
Each engine requires 4 spacer cups.

Will these fit both 2RZ and 3RZ engines?
Yes, these spacer cups are designed to fit both 2.4L 2RZ and 2.7L 3RZ engines.

Warranty

1-Year Warranty

Shipping

• In stock and ready to ship
• Free shipping to the continental USA
• Fast shipping available
• Secure packaging

Order your OEM Toyota injector spacer cup set today to ensure proper fuel injector sealing and reliable engine performance.