NISSAN 11040-75T00 Cylinder Head Skyline Stagea Engine 1/2

( Manufacturer Part Number: 11040-75T00 ), ( Type: Cylinder Head ), ( Country Of Origin: Japan )

Review NISSAN Series 1-2 Cylinder Head Skyline Stagea Engine fits RB25DET

The **Nissan 11040-75T00 RB25DETT cylinder head** is a meticulously engineered component designed exclusively for the legendary **Nissan Skyline GT-R (Stage A, R32 generation)**, a car renowned for its high-performance capabilities and racing pedigree. This forged aluminum head is a direct replacement for the stock **RB25DETT** cylinder head, featuring a **1-2 cylinder head** configuration that allows for a seamless swap when performing a **1-2 swap** a popular modification aimed at enhancing engine balance, power output, and reliability. Crafted from high-grade **7075-T6 aluminum**, this head is not only lightweight but also exceptionally durable, capable of withstanding the extreme stresses of forced induction and high-performance driving. The **11040-75T00** designation ensures compatibility with the **RB25DETT engine**, which powers the Skyline GT-R from 1993 to 1994, making it a critical part for restorers, tuners, and enthusiasts seeking to restore or modify their vehicles to factory or beyond-spec performance levels.

This cylinder head incorporates **precision-machined combustion chambers** and **optimized port geometry**, designed to maximize airflow efficiency while maintaining structural integrity under high RPM and boost pressures. The **intake and exhaust ports** are carefully contoured to improve velocity and scavenging, contributing to better throttle response and increased horsepower when paired with a tuned engine management system. The **spark plug bores** are precisely drilled to accept standard **NGK or Denso** plugs, ensuring reliable ignition performance. Additionally, the head features **integrated valve springs and retainers**, along with **titanium or hardened steel valves** (depending on the specific build), which reduce reciprocating mass and improve valve train efficiency. For those pursuing a **high-performance application**, this head can be paired with **stainless steel or titanium valves**, **solid lifters**, and **adjustable rocker arms** to further enhance durability and power output.

One of the standout features of this cylinder head is its **compatibility with aftermarket upgrades**, including **high-flow intake and exhaust manifolds**, **turbocharged or supercharged setups**, and **direct-injection modifications**. The **1-2 swap** configuration also allows for a more balanced engine by redistributing weight and improving rotational smoothness, a common goal for drivability and performance tuning. Whether used in a **restomod project**, a **street-legal performance build**, or a **track-focused setup**, this cylinder head delivers the reliability and performance expected from a Nissan RB-series engine. Built to exacting standards, it ensures that the Skyline GT-R s iconic **RB25DETT** powerplant operates at peak efficiency, whether under stock conditions or with aggressive modifications. For the discerning enthusiast, this part is not just a replacement it s a foundation for unlocking the full potential of one of motorsport s most iconic engines.

**Pros and Cons of Buying a Nissan 11040-75T00 RB25DETT (Stage A) Cylinder Head**

The **Nissan 11040-75T00 RB25DETT** cylinder head is a critical component for the iconic **Skyline GT-R (Stage A, R32)** and is often sought after by enthusiasts for performance builds, restorations, or swaps. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

---

### **Pros**

1. **Proven Performance and Reliability**

The RB25DETT is one of the most legendary engines in motorsport history, particularly in the **Group A and JGTC (Super GT) racing** eras. The **Stage A (R32) version** was already highly tuned for track use, with features like:

- **High-lift camshafts** for aggressive valve timing, improving top-end power.

- **Ported and polished internals**, including the cylinder head, for better airflow.

- **Proven durability** in high-stress applications, including drifting and racing.

If sourced from a well-maintained or restored example, this head can deliver **reliable, high-performance output** (often **300 HP** with supporting mods).

2. **Aftermarket Support and Customization**

- **Porting and polishing** to further enhance airflow.

- **High-flow intake and exhaust manifolds** to complement the head s design.

- **Forced induction compatibility** (turbo or supercharger) due to its robust construction.

- **Replacement valves, springs, and retainers** if the head is worn.

- **Stage B (R33) and later RB26DETT parts** can often be adapted, expanding upgrade options.

3. **Aesthetic and Nostalgia Value**

The RB25DETT is a **cult classic**, especially in the **Stage A (R32) form**, which is highly sought after by collectors and enthusiasts. Owning or restoring one is a **status symbol** in the JDM tuning community.

4. **Potential for High Power Output**

With proper supporting mods (camshafts, fueling, ignition, and cooling upgrades), this head can push **350 HP** in a stock-block application. When paired with a **turbocharger or supercharger**, power levels can exceed **500 HP** in tuned builds.

5. **Modularity for Future Upgrades**

Unlike some older heads, the RB25DETT s design allows for **substantial modifications** without major overhauls. This makes it a **long-term investment** for those planning to build a high-performance engine.

---

### **Cons**

1. **Age and Wear**

- **Valve seat recession** (common in high-mileage or race-used examples).

- **Exhaust port erosion** from heat and carbon buildup.

- **Camshaft wear** (if the head was used in aggressive driving or drifting).

- **Leaking head gaskets** or warped decks (if the head was overheated).

A **full inspection, porting, and polishing** may be required before use.

2. **Cost of Restoration and Modification**

- **Porting and polishing** are needed (labor and materials add up).

- **Replacement parts** (valves, springs, retainers, seals) are required.

- **Supporting mods** (fueling, cooling, ignition) are necessary for reliable high-power operation.

A **fully restored and ported head** can cost **$1,500 $3,000 **, depending on condition and labor costs.

3. **Limited Stock Performance**

The **Stage A (R32) RB25DETT** is already a **highly modified** engine from the factory (compared to the **Stage 0 or Stage B** versions). If you re looking for a **stock-like experience**, this head is **not ideal** it s designed for **performance and racing**.

4. **Potential for Hidden Damage**

- **Cracked or warped decks** from heat cycles.

- **Exhaust port cracks** (common in high-RPM applications).

- **Camshaft or lifter wear** if the engine was run with poor lubrication.

A **dye penetrant inspection** and **pressure testing** are **highly recommended** before purchase.

5. **Fuel and Ignition Requirements**

The RB25DETT **demands proper fueling** (high-octane, preferably **91 **) and **ignition timing** to avoid detonation. Stock fuel systems (or even mild upgrades) may not be sufficient for **high-power builds**, requiring:

- **Fuel injectors** (often **24 32 lb/hr per cylinder** for 300 HP).

- **High-flow fuel pump** (or dual pumps for turbo builds).

- **Ignition upgrades** (coil-on-plug or distributorless systems for reliability).

6. **Limited Availability of Original Parts**

While aftermarket parts exist, **original Nissan OEM components** (such as **valves, springs, or seals**) can be **hard to find** and expensive. This makes **full restoration or replacement** more costly.

7. **Not Ideal for Beginners**

- **Advanced mechanical knowledge** for tuning and modifications.

- **Regular maintenance** (valve adjustments, camshaft checks, cooling system upgrades).

- **A dedicated budget** for parts and labor.

Beginners may find it **more cost-effective** to start with a **less complex engine** before tackling the RB25.

---

### **Conclusion**

- **Prioritize performance and nostalgia** over stock reliability.

- **Have the budget and mechanical knowledge** to restore and modify it properly.

- **Plan to build a high-power engine** (either naturally aspirated or forced induction).

- **Are willing to invest time and money** in bringing it back to peak condition.

- **Beginners** who lack experience with high-performance engines.

- **Those seeking a stock-like experience** (this head is already heavily modified).

- **Budget-conscious buyers** who cannot afford restoration costs.

- **People who want a plug-and-play solution** (this requires significant work).

---

### **Recommendation**

1. **Source the Head Carefully**

- Look for a **head from a well-documented, restored, or race-used R32 GT-R**.

- **Avoid heads with visible cracks, excessive wear, or unknown history**.

- **Get a professional inspection** (porting, polishing, and pressure testing) before purchase.

2. **Budget for Restoration**

- Expect to spend **$1,500 $3,000 ** for a **fully restored and ported head**, including labor.

- Factor in **supporting mods** (fueling, cooling, ignition) if building for high power.

3. **Consider a Used vs. New Head**

- A **used, restored head** can be **cheaper** but requires **trust in the seller s work**.

- A **new or rebuilt head** (from reputable suppliers like **RB25DETT.com, JDM Engine Works, or eBay Motors**) offers **peace of mind** but at a higher cost.

4. **Plan for Long-Term Maintenance**

- The RB25DETT **needs regular valve adjustments, camshaft checks, and cooling upgrades**.

- **Drift or high-RPM use** will accelerate wear, so **proper lubrication and cooling** are critical.

5. **Alternative Options**

- **A Stage B (R33) RB26DETT head** (more modern, easier to source).

- **A used but well-maintained RB25DETT head** (less aggressive than Stage A).

- **A rebuilt RB25DETT kit** (from companies like **RB25DETT.com**).

---

### **Final Verdict**

You **love the RB25DETT legacy** and want a **high-performance, race-ready head**.

You **have

Details:

Fits: RB25DET Series RB25DET Series Genuine OEM used in great conditions and ready for installation. NISSAN part number: Head Assembly, Cylinder: 11040-75T00.

JDM NISSAN RB25DET Series 1 and 2 CYLINDER HEAD ASSEMBLY. Made in JAPAN. Good for Nissan Skyline, Stagea, Laurel, Leopard, Cedric / Gloria. OEM valves and springs are installed in perfect conditions.

part #: 1104075t00 prices

• $1500.00-$2000.00

specifications cylinderheapar:

• for models: Rb25det
• for makes: Nissan
• mpn: 11040-75t00
• type: Cylinder Head
• country of origin: Japan

offer cylinderheapar:

• started: April 2, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0

payments cylinderheapar:

• other
• credit card: Mastercard
• wallet: Apple-pay

returns cylinderheapar:

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

seller cylinderheapar:

• # reviews: 10381
• city: Miami, Florida
• rating: 99.9%

general cylinderheapar:

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

shipping cylinderheapar:

• cost: $0.00
• class: Standard
• transit: 4-7 Days
• service: Standard
• type: Fixed

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