FORD F1ZZ-6049 Bar Cast Iron Cylinder Heads F1ZE

( Manufacturer Part Number: F1ZZ-6049 ), ( Part Type: Bar Cylinder Head ), ( Manufacturer Warranty: No ), ( Oe/oem Part Number: F1ze Aa ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review FORD Original Bar Cast Iron Cylinder Heads fits 351W GT40 302

The **Ford F1ZZ-6049 302/351W Bar Cast Iron GT40 Cylinder Heads** represent a meticulously crafted, high-performance alternative for enthusiasts seeking the raw, uncompromising power and timeless character of the legendary Ford GT40. These heads are designed to replicate the iconic, race-proven architecture of the original GT40 cylinder heads, which were forged from solid cast iron and featured the distinctive "bar" style combustion chambers so named for their elongated, rectangular shape that maximized compression and flame travel. Engineered to fit the 302 cubic inch (5.0L) and 351 Windsor (5.8L) small-block Ford platforms, these heads are a direct homage to the high-revving, high-stress applications that defined Ford s dominance in the 1960s racing scene. The cast iron construction ensures durability and resistance to thermal shock, making them ideal for both street applications and high-performance builds where reliability and brute strength are paramount. The heads incorporate the classic GT40 porting and valve angles, which promote aggressive airflow and a deep, resonant exhaust note that is instantly recognizable to Ford small-block aficionados. Whether paired with a high-performance camshaft, forged internals, or a supercharger setup, these heads deliver the kind of raw, unfiltered power that turns heads and revs on the track or the street. Perfect for restomod builds, classic car restorations, or modern high-performance applications, these F1ZZ-6049 heads are not just a component; they are a piece of automotive history brought to life with modern precision and craftsmanship.

### Pros and Cons of Buying Ford F1ZZ-6049 302/351W Bar Cast Iron GT40 Cylinder Heads (F1ZE)

1. **Performance Potential** These heads are designed for high-performance applications, particularly in the 302 and 351W engines. They feature a large valve size (2.19" intake, 1.60" exhaust on the 302; 2.20" intake, 1.60" exhaust on the 351W) and a high-compression chamber, making them suitable for forced induction or high-RPM applications. The GT40-style design allows for better airflow and improved breathing compared to stock heads.

2. **Durability** Cast iron heads are known for their strength and heat resistance, making them ideal for high-power engines. They can handle significant boost levels and high RPM without warping as easily as aluminum heads might under extreme conditions.

3. **Compatibility** These heads are designed for the 302 Cleveland and 351W Windsor engines, which are common in muscle cars, street rods, and high-performance builds. They fit stock blocks with minimal modifications, though porting and polishing may be required for optimal airflow.

4. **Aftermarket Support** There is a strong aftermarket presence for these heads, including porting services, valve job kits, and performance parts (e.g., high-flow valves, retainers, and springs). This makes it easier to fine-tune the heads for your specific application.

5. **Aesthetic Appeal** The GT40-inspired design gives the engine a classic, high-performance look, which is appealing for enthusiasts who want a visually striking build.

6. **Cost-Effective for High-Power Builds** While not cheap, these heads are often more affordable than fully custom or exotic heads for similar power levels. They strike a balance between performance and budget for many builders.

7. **Proven Reliability** Many drivers and racers have used these heads successfully in both street and competition applications, lending credibility to their performance claims.

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1. **Weight** Cast iron heads are significantly heavier than aluminum heads, which can add to the rotating mass of the engine. This may slightly reduce high-RPM performance or require additional tuning to optimize power delivery.

2. **Porting and Polishing Required** Stock GT40 heads are not fully ported or polished, so achieving peak airflow will require professional porting and polishing. This adds to the cost and time investment.

3. **Limited Stock Performance** Out of the box, these heads may not outperform stock heads in a naturally aspirated application unless heavily modified. They are best suited for forced induction or high-performance builds.

4. **Potential for Leaks** Cast iron heads can develop cracks or leaks over time, especially under extreme stress (e.g., high boost or detonation). Regular inspection and maintenance are necessary to prevent issues.

5. **Compatibility Issues with Some Blocks** While these heads fit most 302 and 351W blocks, there may be slight clearance issues with aftermarket blocks or heavily modified engines. Always verify fitment before purchasing.

6. **Maintenance Intensity** Cast iron heads require careful maintenance, including regular valve adjustments, gasket replacement, and monitoring for warping or cracks. Neglect can lead to costly failures.

7. **Resale Value** While these heads are desirable for performance builds, they may not retain high resale value compared to more universal or stock parts, especially if heavily modified.

8. **Learning Curve** Building an engine with these heads may require some mechanical knowledge, particularly if you're new to engine assembly or porting. Professional help may be needed for optimal results.

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The **Ford F1ZZ-6049 302/351W Bar Cast Iron GT40 cylinder heads (F1ZE)** are an excellent choice for enthusiasts building a high-performance, naturally aspirated or forced-induction engine in the 302 or 351W platform. They offer significant airflow improvements, durability, and a classic look, making them ideal for street rods, muscle cars, or competition builds. However, they require porting, careful maintenance, and are best suited for applications where power and reliability are prioritized over weight savings.

If you're planning a **high-RPM, high-horsepower build** (especially with forced induction) and can invest in porting and maintenance, these heads are a strong recommendation. For **stock or low-power applications**, they may not be the most cost-effective choice, and stock or aftermarket aluminum heads might be preferable.

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- You are building a **high-performance 302 or 351W engine** (especially with turbo/supercharger).

- You plan to **port and polish** them for optimal airflow.

- You want a **durable, classic-looking** head for a muscle car or street rod.

- You are prepared for **regular maintenance** and potential weight trade-offs.

- You are on a **tight budget** and need a simpler, lower-cost solution.

- Your build is **low-power or naturally aspirated** without significant modifications.

- You prefer **lighter heads** (aluminum) for high-RPM applications.

- You lack experience with **engine assembly or porting** and cannot afford professional help.

For most **high-performance builds**, these heads are a **solid investment** that will significantly enhance power and reliability when properly prepared. Just be sure to budget for porting, gaskets, and maintenance to get the most out of them.

Details:

THIS IS A PAIR OF FORD 302 OR 351W, GT40 3 BAR CAST IRON HEADS. YOU ARE VIEWING A PAIR OF FORD 302 OR 351W CAST IRON 3 BAR GT40 CYLINDER HEADS. THE FORD PART NUMBER IS: F1ZZ 6049. THE HEADS HAVE 1.84 INTAKE AND 1.54 EXHAUST VALVES.

part #: f1zz6049 prices

• $56.99-$1200.00

specifications cylinderheapar:

• for models: 351w, Gt40, 302
• for makes: Ford
• mpn: F1zz-6049
• part type: Bar Cylinder Head
• manufacturer warranty: No
• oe/oem part number: F1ze Aa
• vintage part: Yes
• country of origin: United States

payments cylinderheapar:

• credit card: Discover
• wallet: Paypal
• other

seller cylinderheapar:

• # reviews: 3942
• rating: 100.0%
• city: Hightstown, New Jersey

shipping cylinderheapar:

• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• transit: 3-9 Days
• cost: $129.59
• type: Calculated
• carrier: FedEx

general cylinderheapar:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

offer cylinderheapar:

• availability: In Stock
• started: April 20, 2026
• quantity: 1
• sold: 0
• options: Ship-to-home

returns cylinderheapar:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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