1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11413256872043752
  3. WINDY CITY ENGINE HD1243A

WINDY CITY ENGINE PARTS HD1243A Cylinder Head Bolt 3BAR 1/2 F3ZE-AA

fits model: 351w, Gt40, 302. make: Ford.

F3ze-aa Windy City Engine & Parts Hd1243a 302 351w Ford 3bar Gt40 Remanufactured Cylinder Head 1/2 Inch Bolt #f3ze-aa

( Brand: Windy City Engine Parts ), ( Manufacturer Part Number: HD1243A ), ( Part Type: Cylinder Head Bolt ), ( Oe/oem Part Number: F3ze-aa, F3ze )

Review WINDY CITY ENGINE PARTS Ford 3bar Remanufactured Cylinder Head 1/2 Inch Bolt #f3ze-aa fits 351W GT40 302

The **Ford HD1243A 302/351W 3-Bolt GT40 Cylinder Head (F3ZE-AA)** is a meticulously engineered, high-performance component designed to elevate the breathing and reliability of classic Ford V8 engines, particularly those rooted in the legendary GT40 lineage. This cylinder head represents a fusion of heritage and modern engineering, crafted to deliver exceptional airflow, durability, and compatibility with both the 302 cubic-inch and 351 Windsor (351W) small-block Ford V8 configurations. The **3-bar pattern** a hallmark of the iconic GT40 racing engines is faithfully reproduced, featuring three intake and three exhaust ports per cylinder, optimized for high-revving performance and aggressive camshaft profiles. The **1/2-bolt pattern** ensures seamless integration with modern or restored engines, offering a balance between classic styling and contemporary functionality, while the **F3ZE-AA designation** confirms its authenticity as a direct replacement for the heads used in Ford s legendary racing program.

Constructed from **high-grade cast iron**, this cylinder head is built to withstand the demands of high horsepower applications, whether in street rods, drag racing, or vintage racing setups. The **precision-machined valve seats, guides, and spring bores** ensure smooth operation and longevity, even under extreme loads, while the **integrated rocker studs** provide rigidity and reduce the risk of warping. The **GT40-inspired valve cover design** not only pays homage to Ford s racing heritage but also offers a striking aesthetic for enthusiasts who appreciate both form and function. Whether paired with a **high-performance camshaft, aggressive valve springs, or a forced-induction setup**, this cylinder head is engineered to maximize airflow and power output while maintaining structural integrity.

For those restoring or building a **GT40 replica, a 302/351W high-performance engine, or a modern street machine with classic styling**, the **HD1243A** is an indispensable component. Its **OEM-compatible dimensions** including bolt pattern, deck height, and valve angles ensure a perfect fit with stock or aftermarket components, while its **race-proven durability** makes it a favorite among builders seeking a blend of authenticity and performance. Whether used in a **restomod project, a high-revving street engine, or a competition setup**, this cylinder head delivers the **breathing efficiency, strength, and timeless design** that define Ford s racing legacy.

### **Pros and Cons of Buying a Ford HD1243A 302/351W 3-Bar GT40 Cylinder Head (1/2 Bolt, F3ZE-AA)**

#### **Pros**

1. **Performance Potential** The HD1243A is a high-performance cylinder head designed for high RPM and aggressive camshafts. It features a 3-bar pattern (three exhaust ports per cylinder), which improves exhaust flow and scavenging, leading to better horsepower and torque, especially when paired with a high-flow camshaft.

2. **1/2 Bolt Design** The 1/2 bolt pattern (instead of the traditional 1/4 bolt) reduces reciprocating mass, allowing for higher RPM operation. This is particularly beneficial for forced induction builds (turbo/supercharged) or high-revving naturally aspirated engines.

3. **GT40-Inspired Flow** The head is based on the iconic Ford GT40 racing engine design, which means it has been optimized for high-flow characteristics. This makes it a strong choice for drag racing, street tuning, or competition applications.

4. **Durability & Strength** The F3ZE-AA designation suggests it is built to handle high stress, making it suitable for aggressive builds. The 3-bar pattern also distributes heat better than a 2-bar head, reducing the risk of overheating under heavy loads.

5. **Compatibility with Modern Engines** While originally designed for the 302/351W Cleveland engine family, this head can be adapted to other Ford V8 platforms (e.g., 351W, 428 CJ, or even modified 351 Cleveland) with proper porting and gasket matching.

6. **Aftermarket Support** These heads are well-documented in the tuning community, with available porting services, valve spring upgrades, and supporting components (e.g., high-flow intake manifolds, headers).

7. **Aesthetic Appeal** For enthusiasts who appreciate classic Ford racing heritage, the GT40-inspired design adds a unique look to a build.

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#### **Cons**

1. **Cost** High-performance cylinder heads like the HD1243A are significantly more expensive than stock or aftermarket alternatives (e.g., Edelbrock, Holley, or even stock Ford heads with porting). The price can range from **$1,500 $3,000 ** depending on condition, porting, and supporting modifications.

2. **Complexity & Modifications Required** This head is not a "drop-in" replacement. It requires:

- **Porting & Polishing** Even if purchased pre-ported, further refinement may be needed for optimal flow.

- **Valve Spring Upgrades** The 1/2 bolt design and high-RPM use often necessitate stronger valve springs to prevent valve float.

- **Gasket & Sealing Issues** The aggressive porting can make sealing difficult, requiring high-quality gaskets (e.g., ARP or custom-machined).

- **Camshaft Selection** A high-lift, long-duration cam is often required to fully utilize the head s potential, which can add to cost and complexity.

- **Fuel & Ignition Upgrades** The power gains may require a fuel injection system (e.g., Holley, Edelbrock, or standalone ECU) and upgraded ignition (e.g., MSD, AER).

3. **Limited Stock Availability** These heads are not mass-produced for the aftermarket. Finding a high-quality, pre-ported example can be difficult, and sourcing parts (e.g., springs, retainers) may require special ordering.

4. **Learning Curve** Building an engine around this head requires mechanical knowledge, especially if attempting DIY porting, balancing, or tuning. Mistakes can lead to poor performance or engine damage.

5. **Weight Considerations** While the 1/2 bolt design reduces reciprocating mass, the head itself is heavier than stock alternatives. This can slightly offset some of the RPM gains.

6. **Not Ideal for Low-RPM Applications** If your primary use is low-RPM torque (e.g., towing, heavy-duty street driving), a more traditional head (e.g., 2-bar or stock ported) may be more practical and cost-effective.

7. **Potential for Overkill** For casual street use or mild builds, the HD1243A may offer diminishing returns compared to simpler, less expensive modifications (e.g., porting a stock head, upgrading the cam, or adding a supercharger).

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### **Conclusion & Recommendation**

The **Ford HD1243A 302/351W 3-Bar GT40 1/2 Bolt Head (F3ZE-AA)** is one of the most aggressive and high-performance cylinder heads available for Ford V8 engines. It excels in **high-RPM applications, forced induction builds, and competition engines** where maximum airflow and durability are critical. However, it is **not a simple or budget-friendly solution** it demands significant additional modifications, mechanical expertise, and a willingness to invest in supporting components.

#### **Who Should Buy It?**

- **Drag racers** looking for a high-revving, high-horsepower setup.

- **Forced induction (turbo/supercharged) builds** where reduced reciprocating mass and improved scavenging are beneficial.

- **Enthusiasts** who prioritize classic Ford racing heritage and are willing to invest in a premium performance part.

- **Builders** with mechanical experience or access to professional porting and tuning services.

#### **Who Should Avoid It?**

- **Casual street drivers** or those on a tight budget simpler modifications (e.g., ported stock heads, mild cams) may suffice.

- **Low-RPM torque applications** (e.g., towing, heavy-duty hauling) where a more traditional head would be more practical.

- **Beginners** without experience in engine building, porting, or tuning this head requires advanced knowledge to fully utilize.

#### **Final Recommendation**

If you are **building a high-performance, high-RPM Ford V8 (especially for racing or forced induction)**, the HD1243A is an excellent choice **provided you are prepared for the associated costs, modifications, and technical challenges**. Pair it with:

- A **high-flow camshaft** (e.g., Crane, Comp Cams, or JE).

- **Upgraded valve springs and retainers** (e.g., ARP, JE).

- A **fuel injection system** (e.g., Holley, Edelbrock, or standalone ECU).

- **High-quality headers and intake** to complement the head s flow potential.

If you are **not committed to a high-performance build**, consider more affordable alternatives like **ported stock heads, aftermarket 2-bar heads, or mild Cleveland heads** before investing in the HD1243A.

For those who meet the criteria, this head will **deliver exceptional power and reliability** but only if the rest of the engine and supporting systems are properly upgraded to match.

Details:

Guide work performed/replaced with new guides or liners as needed. Cut valve seats. Each Valve is vacuum tested to insure a perfect seal between the valve and seat. Head is assembled with all new valve seals and freeze plugs.

All valves are reground or replaced with new. Windy City Engine Parts. Process Includes. All machine work performed on the latest state of art equipment.

1- Remanufactured Cylinder head, Fits 302 351W Ford GT40 With 3-bars on end 1/2 Head bolt Holes And Casting number F3ZE-AA, was remanufactured by. to insure no cracks in casting. All parts are thoroughly cleaned and inspected before assembly. Milled to ensure straightness and correct finish.

part #: hd1243a price

  • $550.00

specifications cylinderheapar:

  • for models: 351w, Gt40, 302
  • for makes: Ford
  • brand: Windy City Engine Parts
  • mpn: Hd1243a
  • part type: Cylinder Head Bolt
  • oe/oem part number: F3ze-aa, F3ze

offer cylinderheapar:

  • availability: In Stock
  • options: Ship-to-home
  • quantity: 4
  • sold: 0
  • started: February 1, 2026

general cylinderheapar:

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

returns cylinderheapar:

  • policy: No Returns

shipping cylinderheapar:

  • service: UPS Ground, UPS Next Day Air Saver, UPS Next Day Air
  • carrier: UPS
  • cost: $160.38
  • transit: 3-6 Days
  • type: Calculated
  • class: Standard, One-day

seller cylinderheapar:

  • # reviews: 2699
  • rating: 99.9%
  • City: Chicago, Illinois

payments cylinderheapar:

  • other
  • wallet: Google-pay
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for models: 351w, gt40, 302, for makes: ford, part type: cylinder head bolt, oe/oem part number: f3ze-aa, f3ze,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 11413256872043752,
Windy City Engine Parts HD1243A Is Similar To:
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2 offers $550.00–$550.00 USD
  • Remanufactured. Offer #1 priced at $550.00 + $160.38 shipping estimate = $710.38* total. All parts are thoroughly cleaned and inspected before assembly. 302 Ford GT40.+$160.38 shipping
  • Remanufactured. Offer #2 priced at $550.00 + $160.38 shipping estimate = $710.38* total. 1/2" Head bolt Holes 302 351W Ford GT40.+$160.38 shipping

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