HONDA 10003-PZX-A02 Cylinder Head AP2 F22C1

( Manufacturer Part Number: 10003-PZX-A02 ), ( Items Included: Valve Covers ), ( Material: Aluminum ), ( Vintage Part: No ), ( Fuel Type: Gasoline ), ( Type: Cylinder Head ), ( Manufacturer Warranty: 1 Year ), ( Block Type: Straight ), ( Number Of Valves: 16 )

Review HONDA Ap2 Cylinder Head Bare fits S2000

The **Honda 10003-PZX-A02 S2000 AP2 F22C1 Cylinder Head (Bare)** is a meticulously engineered, high-performance component designed exclusively for Honda s legendary **S2000 (AP2 model, F22C1 engine)**, a car renowned for its precision engineering, lightweight construction, and track-ready capabilities. This bare cylinder head represents the foundational element of the engine s combustion system, crafted from **high-grade aluminum alloy** to balance strength, weight, and thermal efficiency. The head features a **dual overhead camshaft (DOHC) design**, complete with **four valves per cylinder (intake and exhaust)** arranged in a compact, high-flow configuration to optimize airflow and maximize power output. The **intake ports** are generously sized and contoured to promote smooth, high-velocity air intake, while the **exhaust ports** are precision-machined to minimize backpressure and enhance scavenging efficiency, critical for both street and track performance. The **valve guide and seat surfaces** are designed to accommodate aftermarket upgrades, including larger valves, hardened seats, and high-performance springs, allowing enthusiasts to fine-tune the engine s breathing characteristics for increased horsepower and torque. This cylinder head is compatible with the **AP2 S2000 s F22C1 engine variant**, which powers the **2003 2007 models**, and is often sought after by restorers, tuners, and performance builders looking to restore or modify their S2000 s engine to factory or even beyond-specification standards. Whether used as a replacement for a worn or damaged original part or as a blank slate for custom modifications, this cylinder head embodies the **precision and reliability** that Honda s high-performance engines are celebrated for, making it an essential component for anyone aiming to preserve or enhance the S2000 s legendary driving dynamics.

### **Pros and Cons of Buying a Honda 10003-PZX-A02 S2000 Cylinder Head (AP2, F22C1) Bare**

1. **High Performance Potential** The AP2 engine in the S2000 is a legendary inline-four with a naturally aspirated, high-revving design. A bare cylinder head allows for modifications like porting, polishing, or upgrading internals (valves, springs, retainers) to improve airflow and power output.

2. **Aftermarket Support** The S2000 has a strong aftermarket community, with readily available parts for tuning, including custom cylinder heads, intake manifolds, and exhaust systems. This makes it easier to build a high-performance engine.

3. **Lightweight and Compact** The S2000 s engine is small and lightweight compared to many modern engines, making it ideal for drifting, track use, or street performance builds where weight distribution matters.

4. **Durability with Proper Maintenance** The AP2 is known for lasting well with proper care, especially if the internals (pistons, rods, crankshaft) are upgraded alongside the cylinder head. Many examples exceed 200,000 miles with minimal issues if maintained correctly.

5. **Aesthetic and Cultural Appeal** The S2000 is a highly sought-after car, and a modified AP2 engine is a prized component for enthusiasts. Owning a bare cylinder head allows for a custom build, whether for a restoration or a fresh engine project.

6. **Cost-Effective Modifications** Compared to buying a complete engine, a bare cylinder head is significantly cheaper, allowing for a more budget-friendly performance upgrade.

7. **Compatibility with Other AP2 Engines** The cylinder head is compatible with other AP2 variants (F22C1, F22C2, etc.), making it a versatile choice if you plan to swap parts or build a custom engine.

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1. **Complexity of Installation** Installing a bare cylinder head requires machining, gasket sealing, valve adjustment, and often port matching with the intake manifold. This is a labor-intensive process that may require professional help, increasing costs.

2. **Potential for Hidden Damage** A used cylinder head may have internal issues such as warping, cracked valves, or worn valve guides/seats. Without a thorough inspection (or machining), these problems can lead to engine failure.

3. **Limited Stock Availability** While Honda parts are widely available, a bare cylinder head may not always be in stock at local dealers. Purchasing from an online seller (eBay, Craigslist, etc.) increases the risk of counterfeit or mismatched parts.

- Intake manifold (stock or aftermarket)

- Exhaust manifold (or headers)

- Valvetrain components (valves, springs, retainers, pushrods)

- Gaskets and seals

- Machining (if porting or resurfacing is needed)

- This adds to the overall cost and complexity of the project.

5. **Risk of Overbuilding** If not properly balanced with the rest of the engine (pistons, crankshaft, fueling, ignition), modifying just the cylinder head can lead to premature wear or failure (e.g., valve float, rod bearing issues).

6. **Time-Consuming Project** Building an engine from a bare cylinder head is a significant time investment, especially for someone without mechanical experience. This may not be ideal for those seeking a quick performance upgrade.

7. **Depreciation Risk** While the S2000 is a classic, parts for it are not as widely available as they once were. Future repairs or replacements may become more difficult or expensive over time.

---

Buying a bare Honda 10003-PZX-A02 S2000 cylinder head can be a **great investment for enthusiasts** who are willing to put in the work to modify and install it properly. It offers **excellent performance potential** and is a **cost-effective way to upgrade an engine**, especially for those building a custom AP2 or restoring an S2000. However, it is **not a simple purchase** it requires mechanical skill, additional parts, and potentially professional machining to ensure reliability.

If you are **experienced with engine work** and have the time/resources to complete the build, this is a **strong choice** for maximizing power and preserving the S2000 s legendary character. If you are **new to engine modifications** or seeking a quick fix, it may be better to consider a **complete engine swap or a pre-built performance kit** instead.

---

- **For Experienced Builders:** Proceed with purchasing the bare cylinder head, ensuring it is **inspected for warping, cracks, or internal damage** before buying. Plan for machining (porting, valve job) and acquire all necessary supporting components (intake, exhaust, valvetrain).

- **For Beginners or Quick Upgrades:** Consider buying a **complete AP2 engine** (from a reputable seller) or a **pre-built performance kit** (e.g., from companies like **Honda Performance Parts, JE, or local tuners**) to avoid the complexity of a bare head build.

- **Always Verify Sourcing:** Buy from **trusted sellers** (eBay verified, local Honda specialists, or reputable online marketplaces) to avoid counterfeit or mismatched parts.

- **Budget for Machining:** If porting or resurfacing is needed, factor in **$200 $500 ** for professional work, depending on the extent of modifications.

Ultimately, the **10003-PZX-A02 cylinder head is a fantastic component for the right project**, but it demands **careful planning and execution** to avoid costly mistakes.

Details:

2005 Honda S2000 ap2 cylinder head - bare. Please reference pictures, damage in cylinder #2 bowl one valve seat retainer broke, spring dug into. Other than that, it appears to in good condition.

part #: 10003pzxa02 prices

• $135.95-$299.95

specifications cylinderheapar:

• for models: S2000
• for makes: Honda
• mpn: 10003-pzx-a02
• items included: Valve Covers
• material: Aluminum
• vintage part: No
• fuel type: Gasoline
• type: Cylinder Head
• manufacturer warranty: 1 Year
• block type: Straight
• number of valves: 16

general cylinderheapar:

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

shipping cylinderheapar:

• type: Fixed
• service: USPS Ground Advantage
• transit: 5-9 Days
• carrier: USPS
• class: Standard
• cost: $40.00

payments cylinderheapar:

• wallet: Paypal
• credit card: Visa
• other

seller cylinderheapar:

• # reviews: 18
• rating: 100.0%
• city: Buda, Texas

offer cylinderheapar:

• sold: 0
• started: April 27, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• best offers: True

returns cylinderheapar:

• policy: No Returns

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