New Pair Toyota Tundra Tacoma 4Runner 3.4 DOHC #5VZFE Cylinder Heads with Head Gasket Set and Bolts, Water Pump & Timing Set

Upgrade your Toyota Tundra, Tacoma, or 4Runner with our Toyota 3.4L DOHC #5VZFE Cylinder Head kit. Engineered for performance and durability, this kit includes fully assembled cylinder heads with valves, springs, retainers, head gasket set, bolts, and now also includes a water pump and timing set. This complete solution ensures a seamless installation and optimal engine performance for your Toyota 3.4L engine.

Key Features:

• High-Quality Construction: Designed for strength and durability, these Toyota 3.4 Cylinder Heads are built to handle both daily driving and off-road adventures, offering long-lasting performance.
• OEM Specifications: This kit is designed to meet or exceed OEM standards, ensuring a perfect fit for Toyota Tundra, Tacoma, and 4Runner models equipped with the 3.4L DOHC #5VZFE engine.
• Fully Assembled: The cylinder heads come fully assembled with valves, springs, retainers, head gasket set, and bolts for a quick and easy installation process.
• Water Pump & Timing Set Included: Along with the cylinder heads and gasket set, the package also includes a water pump and timing set—vital components for an efficient engine rebuild.

Benefits of the Toyota 3.4 Cylinder Head Kit:

• Enhanced Engine Performance: Optimized airflow and combustion efficiency improve engine performance, fuel efficiency, and overall vehicle reliability.
• Long-Lasting Durability: Built with reinforced materials that prevent cracking and wear, extending the lifespan of your engine.
• Easy Installation: The direct-fit design makes installation quick and simple—everything you need is included, ensuring a hassle-free replacement experience.
• Complete Engine Rebuild: The addition of the water pump and timing set ensures your engine runs optimally and is ready for any adventure, whether on-road or off-road.

Fitment Data:

4 RUNNER 01-02 (6 cylinder, 5VZFE engine), 

4 RUNNER 96-00 6 cylinder (5VZFE engine), 

T100 95-98 6 cylinder (5VZFE engine), 

TACOMA 95-04 6 cylinder (5VZFE engine), 

TUNDRA 00 6 cylinder, 

TUNDRA 01-04 6 cylinder (5VZFE engine),

Technical Specifications:

• Engine Compatibility: 3.4L DOHC #5VZFE engine
• Fits: Toyota Tundra, Tacoma, 4Runner (1995-2004 models)
• Cylinders: V6 engine
• Fully Assembled: Includes valves, springs, retainers, head gasket set, bolts, water pump, and timing set—ready to install.

Why Choose Our Toyota 3.4 Cylinder Heads?

• Enhanced Engine Efficiency: Improve the overall performance and fuel economy of your Toyota with optimized combustion and airflow.
• Durability for Tough Conditions: With reinforced construction, this cylinder head kit ensures longevity, even for off-road and high-stress driving environments.
• Complete Package for Convenience: Along with the cylinder heads, you get everything needed for a complete engine rebuild: head gasket set, bolts, water pump, and timing set. Everything’s included for your convenience and peace of mind.

Warranty Information:

This product is backed by a 2-year unlimited mileage parts warranty. The warranty covers parts only and does not include labor or incidental costs.

Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

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