PORSCHE 901.104.308.1R Cylinder Head Set Mfi 911.104.308.1R 2.0L 911S

( Manufacturer Part Number: 901.104.308.1R ), ( Type: Cylinder Head ), ( Country Of Origin: Germany )

Review PORSCHE Cylinder Head Set Mfi 2.0l Heads fits 911 1969

The **1969 Porsche 911S (901.104.308.1R) cylinder head set (MFI 911.104.308.1R, 2.0L)** represents a meticulously engineered restoration component designed to breathe new life into one of the most iconic and performance-oriented models in Porsche s legendary 911 lineup. Originally introduced in 1969, the 911S was the sportiest variant of the first-generation 911, featuring a high-revving 2.0-liter flat-six engine producing a robust 130 horsepower and a top speed exceeding 140 mph all while maintaining the timeless, wedge-shaped silhouette that defined the era. The cylinder head set for this model is a critical upgrade for enthusiasts seeking to restore or enhance the performance of their 911S, as it incorporates modern manufacturing techniques while adhering to the original design specifications that made the engine so revered.

This **MFI (Mechanik-Fertigungseinheit) head set** is specifically tailored for the **911.104.308.1R** chassis, which denotes the 911S variant with the 2.0-liter engine and the distinctive "901" badge (later rebranded as "911" after Peugeot s trademark dispute). The heads are crafted from high-quality aluminum alloy, machined to precise tolerances to ensure optimal combustion efficiency, cooling performance, and durability. Key features include **modern valve seats and guides**, which reduce wear and improve sealing, as well as **upgraded intake and exhaust ports** that enhance airflow dynamics for better throttle response and power delivery. The valve springs and retainers are also included, often upgraded to aftermarket or high-performance specifications to withstand the increased stresses of modern fuels and higher RPM operation, a common concern for high-revving 911 engines.

One of the most significant advantages of this head set is its **compatibility with modern fuel injection systems**, particularly the **MFI (Mechanik-Fertigungseinheit) or later Bosch L-Jetronic** setups, which were introduced in later 911 models but can be retrofitted into the 911S for improved reliability and performance. The heads are designed to integrate seamlessly with the **2.0L 911S engine s original mechanical fuel injection or carbureted configurations**, though they are particularly well-suited for those transitioning to electronic fuel management for better tuning flexibility. The **intake manifold ports** are optimized for improved airflow, reducing turbulence and allowing for a more efficient charge into the combustion chamber a subtle but meaningful upgrade for an engine that already delivered exhilarating performance in its heyday.

For restoration projects, this head set is an invaluable component, as it addresses common issues associated with aging 911S engines, such as **valve seat recession, warped head surfaces, and worn valve guides**. The **newly machined deck surfaces** ensure a proper seal with the cylinder block, preventing compression leaks that can sap power and cause overheating. Additionally, the **modern valve springs** are designed to handle the higher stresses of modern driving conditions, reducing the risk of valve float at high RPM a critical consideration for the 911S s naturally aspirated, high-revving nature. The **exhaust ports** are also refined to minimize backpressure, allowing exhaust gases to exit more efficiently, which can contribute to a slight increase in horsepower and a more linear powerband.

Beyond performance, this head set is a **restoration-grade component** that preserves the authenticity of the 911S while incorporating modern reliability improvements. The **precision machining** ensures that the heads fit perfectly with the original engine bay components, including the **timing cover, oil pump, and water pump**, without requiring extensive modifications. For collectors and enthusiasts who prioritize both aesthetics and mechanical integrity, this head set offers a compelling balance restoring the engine to its original specifications while future-proofing it against the wear and tear of daily driving or track use. Whether installed in a fully restored 911S for concours-level show quality or in a project car aimed at reviving its legendary performance, this cylinder head set is a testament to Porsche s engineering legacy and the enduring appeal of the 911S.

### **Pros and Cons of Buying a 1969 Porsche 911 (901/996) with MFI 2.0L Cylinder Head Set (Part Numbers: 911.104.308.1R, 911.104.308.1R 1R, 911.104.308.1R 2.0L Heads)**

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### **Pros**

1. **Performance and Reliability (When Properly Maintained)**

- The **MFI (Mechanically Fuel-Injected) 2.0L engine** (introduced in 1974 but retrofitted to some earlier models) improves power, smoothness, and fuel efficiency compared to the carbureted 911s.

- A **new cylinder head set (911.104.308.1R)** restores or enhances compression, valve sealing, and cooling efficiency, reducing the risk of overheating and valve float at high RPM.

- The **2.0L heads** (with larger valves and improved porting) allow for better airflow, making the engine more responsive, especially when paired with a performance camshaft or tuning.

2. **Restoration and Collectibility Value**

- A **fully restored 1969 911 with MFI and updated heads** is highly desirable among classic Porsche enthusiasts, particularly those who appreciate later-era modifications.

- The **1R (911.104.308.1R) head casting** is a later revision with improved durability, making it a preferred choice over earlier heads for long-term reliability.

- If the car is in **showroom condition**, it can command a premium at auctions (e.g., RM Sotheby s, Bonhams) or among private collectors.

3. **Driving Experience**

- The **MFI system eliminates carburetor drift**, providing more consistent throttle response, especially in stop-and-go traffic.

- With the **2.0L heads**, the engine can achieve ** 130 150 HP** (depending on tuning and carb setup), which is a noticeable improvement over the stock 110 HP of a carbureted 911.

- The **weight reduction** from modern materials in the head set (e.g., lighter valve springs, improved gaskets) can slightly improve high-RPM performance.

4. **Easier Maintenance and Modifiability**

- MFI systems are **simpler to maintain** than carburetors (no float adjustments, less fouling).

- High-flow exhaust manifolds

- Performance camshafts (e.g., Weiss, Holinger)

- Upgraded ignition systems (e.g., MSD, NGK plugs)

- Fuel injection tuning (e.g., Megasquirt, Haltech)

- The **1R head casting** is more robust than earlier versions, reducing the risk of warping or cracking with aggressive modifications.

5. **Market Demand for Modified Classics**

- There is a **growing market for "modernized" classic Porsches**, particularly those with **MFI conversions or performance upgrades**.

- A **well-documented MFI 911 with updated heads** can attract buyers who want a **drivable, restored, yet still classic** Porsche rather than a fully original example.

---

### **Cons**

1. **High Cost of Acquisition and Restoration**

- A **1969 911 in original condition** is already expensive (typically **$150,000 $300,000 ** depending on provenance, mileage, and restoration quality).

- **MFI kit (including fuel pump, injectors, ECU, wiring):** **$5,000 $12,000** (labor-intensive installation).

- **2.0L cylinder head set (911.104.308.1R):** **$3,000 $6,000** (new or reconditioned).

- **Engine rebuild (if needed):** **$10,000 $20,000 ** (labor, parts, dyno tuning).

- **Labor costs** for a classic Porsche are **high** due to specialized mechanics and limited availability.

2. **Potential Reliability Issues**

- **MFI systems on older engines** can be **prone to fuel pump failures, sensor issues, and ECU glitches**, especially if not properly maintained.

- **2.0L heads** are an improvement, but **valve springs and retainers** can still fail at high RPM, leading to **valve float** if not upgraded.

- **Oil consumption** can increase with aggressive modifications, requiring **frequent oil changes** (every 3,000 5,000 miles).

- **Warped heads** (even with 1R castings) can still occur if the engine overheats, leading to **leaking gaskets or poor compression**.

3. **Devaluation Risk (Originality vs. Modified Status)**

- While some collectors appreciate **modified classics**, others **prefer fully original** 911s, which can **depreciate slower** than heavily modified examples.

- An **MFI-converted 911** may **not hold value as well** as a carbureted 911 in the eyes of purists.

- **Insurance costs** may increase due to the **higher performance and modification level**.

4. **Complexity of Installation and Tuning**

- **ECU programming** (Porsche or aftermarket, e.g., Megasquirt).

- **Fuel system upgrades** (high-flow pump, proper injectors).

- **Exhaust and intake modifications** to match airflow.

- **Dyno tuning is nearly mandatory** to avoid **lean or rich mixtures**, which can damage the engine.

- **OBD-II compatibility issues** older MFI systems may not work well with modern diagnostic tools unless retrofitted.

5. **Limited Aftermarket Support**

- While **2.0L heads** are more modern, **not all performance parts** (e.g., high-flow headers, turbo kits) are readily available for a **1969 911**.

- **Finding a specialist mechanic** who works on **MFI 911s** can be difficult, increasing downtime and repair costs.

- **Spare parts** (e.g., specific sensors, wiring harnesses) can be **expensive or hard to source**.

6. **Environmental and Legal Considerations**

- **Emissions compliance** may be an issue in some regions, requiring **additional modifications** (e.g., catalytic converters, smog testing).

- **Classic car insurance** can be **costly** for a high-performance modified 911, especially if used for track days.

---

### **Conclusion**

Buying a **1969 Porsche 911 with an MFI conversion and 2.0L cylinder head set (911.104.308.1R)** is a **high-risk, high-reward** decision. The **performance gains, modern reliability improvements, and collectibility** make it an attractive option for **enthusiasts who want a drivable, high-performance classic**. However, the **extreme cost, complexity, and potential reliability concerns** mean it is **not suitable for casual collectors or those seeking a simple restoration project**.

If you are **passionate about Porsches, have deep pockets, and are willing to invest time in tuning and maintenance**, this modification can **significantly enhance driving enjoyment and long-term usability**. However, if **preservation of originality, lower cost, or ease of maintenance** are priorities, a **carbureted 911 or a later-model MFI 911 (e.g., 1975 )** may be a more practical choice.

---

### **Recommendation**

- **Proceed with caution.** Ensure the **MFI conversion is professionally installed** with **proper tuning and diagnostics**.

- **Budget for at least $200,000 $300,000** for a **restored 1969 911 with MFI and 2.0L heads**, including potential engine rebuilds.

- **Prioritize reliability** consider **upgrading valve springs, oil system, and cooling** to mitigate long-term risks.

- **Join Porsche forums (e.g., Porsche911Club, 911.com)** to learn from experienced owners before committing.

- **Stick with a carbureted 911** (e.g., 996 or 997) for **lower maintenance and better long-term value**.

- **Consider a later MFI 911 (1975 1983)** these are **more common, easier to modify,

Details:

I do not see any abnormal signing of wear or obvious flaws. That being said, I am not a machinist. Please evaluate the photos for condition. Excellent set of 1969 911S cylinder heads.

part #: 9011043081r prices

• $1295.00-$2495.00

specifications cylinderheapar:

• for models: 911
• for makes: Porsche
• for years: 1969
• mpn: 901.104.308.1r
• type: Cylinder Head
• country of origin: Germany

shipping cylinderheapar:

• service: Standard
• transit: 3-9 Days
• class: Standard
• cost: $65.00
• type: Fixed

offer cylinderheapar:

• best offers: True
• sold: 0
• quantity: 1
• options: Ship-to-home
• started: May 11, 2026
• availability: In Stock

returns cylinderheapar:

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

seller cylinderheapar:

• # reviews: 23669
• rating: 100.0%
• city: Felton, California

general cylinderheapar:

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

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