Description
Product Overview
The DNJ Head Spacer Shim is a precision‑engineered component designed to sit between the engine block and cylinder head on 1994‑2004 Toyota trucks equipped with 2.4L‑2.7L L4 DOHC engines (3RZ‑FE, 2RZ‑FE). Constructed from high‑grade steel, the 0.020‑inch thick shim provides a stable, uniform gap that helps maintain proper head torque, reduces warpage, and improves compression. Its compact 15 × 12 × 2 inches dimensions and lightweight 9.6 oz weight make installation straightforward without adding bulk.
Usage
This shim is intended for use during cylinder head gasket replacement, engine rebuilds, or performance upgrades on Toyota Tacoma, 4Runner, and T100 models. It is installed on the engine block side, ensuring even pressure distribution across the head bolts. Ideal for both DIY enthusiasts and professional mechanics, the shim performs reliably in daily driving, off‑road conditions, and under moderate towing loads.

Why Choose Us
DNJ Engine Components brings over 30 years of expertise in domestic and Japanese engine parts. Each shim undergoes rigorous quality testing to meet OEM specifications, guaranteeing fit and durability. Our partnership with DNJ ensures you receive a product backed by a trusted brand, supported by comprehensive documentation and responsive customer service.
Key Features
- 0.020 inch thickness for optimal head clearance
- High‑strength steel construction for long‑lasting durability
- Exact fit for 94‑04 Toyota 3RZ‑FE and 2RZ‑FE engines
- Reduces valve‑train stress and improves compression
- Lightweight design simplifies installation and handling
FAQ
Is this shim compatible with all 1994‑2004 Toyota models?
It is compatible with Toyota Tacoma, 4Runner, and T100 models that use the 3RZ‑FE or 2RZ‑FE L4 engines.
Can I install the shim myself?
Yes, the shim is designed for straightforward installation during a head gasket replacement. Follow the service manual for torque specifications.
What is the benefit of a 0.020 inch shim?
The thin shim provides a precise gap that helps maintain head bolt tension, reduces warpage, and enhances overall engine compression.
Does the shim affect engine performance?
By improving head sealing and reducing stress on the valve train, the shim can lead to smoother idle, better throttle response, and marginal gains in power.
Is there a warranty?
DNJ offers a limited warranty covering manufacturing defects for up to 12 months from the date of purchase.





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