PORSCHE 306-50257L Driver Cylinder Head Engine 4.8L

( Model: CAYENNE ), ( Part Type: Driver Cylinder Head Engine ), ( Conditions Options: Lh, Cylinder Head, Off And Ready To Go ), ( Genuine Oem: Yes ), ( Ipn: 306-50257l ), ( Placement: Driver/left ), ( Year: 2009 )

Review PORSCHE Driver Cylinder Head 4.8l Engine fits CAYENNE TURBO 2008–2010

The **Porsche 997.0 (2008 2010) Cayenne S (9A2) 4.8L Twin-Turbo V8 Driver s Side Cylinder Head (Part #50257L)** is a precision-engineered component designed exclusively for the high-performance, turbocharged 9A2 generation of Porsche s flagship SUV. This head is a critical element of the **PA4300/01 4.8-liter Twin-Turbo V8 engine**, which delivers an exhilarating 450 horsepower and 450 lb-ft of torque, propelling the Cayenne S from 0-60 mph in under 5.0 seconds. Crafted from high-grade aluminum alloy, the driver s side cylinder head features an advanced **four-valve-per-cylinder design** with **pneumatic valve lifters**, ensuring smooth operation and optimal airflow for peak performance. The head incorporates **direct and port fuel injection**, along with **high-flow turbochargers** (Garrett GTX 2860/2861), allowing for aggressive turbocharging while maintaining reliability. Key features include **integrated intake and exhaust manifolds**, **high-pressure fuel rail mounting points**, and **precise valve timing** via a **variable valve timing (VVT) system** on the intake side, enhancing both low-end torque and high-revving capability. This head is compatible with the **9A2 Cayenne S (2008 2010)** and is essential for maintaining factory performance, especially after extensive modifications or rebuilds. Built to Porsche s exacting standards, it ensures seamless integration with the engine s **dual-turbo setup**, **intercooler system**, and **direct injection** components, delivering the raw power and refined efficiency that define the Cayenne S. Whether for a restoration, performance upgrade, or replacement due to wear, this cylinder head is a must-have for enthusiasts seeking to preserve or enhance the legendary driving dynamics of Porsche s most capable SUV.

### **Pros and Cons of Buying a Porsche 997.0 (997.1) Cayenne (08-10) with a 4.8L Turbo Engine (Part Number 50257L Driver Cylinder Head)**

#### **Pros**

1. **Performance and Power**

The 4.8L V8 engine in the Cayenne (especially in the Turbo and Turbo S variants) delivers strong performance, producing around 400 450 horsepower depending on the model year and tuning. This provides a robust driving experience with good acceleration and towing capacity.

2. **Reliability of the Engine**

The 4.8L engine (based on the 911 GT3 s engine) is known for being durable if properly maintained. Many owners report longevity if oil changes are done on schedule and other service intervals are followed.

3. **Aftermarket Support**

The 4.8L engine has a strong aftermarket presence, with readily available parts, upgrades (e.g., turbo kits, intercoolers, exhaust systems), and tuning solutions. This makes modifications easier and more affordable compared to some other Porsche engines.

4. **Luxury and Comfort**

The Cayenne is a luxury SUV, offering a spacious interior, high-quality materials, and advanced driver aids (depending on the trim). It provides a comfortable ride suitable for daily driving and long trips.

5. **Resale Value**

While not as high as a 911, the Cayenne retains decent resale value, especially for well-maintained examples. The 4.8L Turbo models are generally more desirable than the naturally aspirated versions.

6. **Towing and Hauling Capability**

The Cayenne s V8 engine provides strong towing power (up to 7,716 lbs in some models), making it a practical choice for those who need to tow trailers or boats.

7. **Sporty Handling**

Despite being an SUV, the Cayenne offers engaging handling, especially in the Turbo S or PDK variants. The 4.8L engine contributes to a more dynamic driving experience compared to smaller engines.

---

#### **Cons**

1. **High Cost of Ownership**

Porsche vehicles, including the Cayenne, are expensive to maintain. Parts, labor, and repairs (especially for the turbocharged engine) can be costly. The 4.8L engine, while robust, requires high-quality oil and filters to prevent carbon buildup and turbo failure.

2. **Turbocharger Reliability Issues**

The Garrett turbochargers in the 4.8L engine are prone to failure over time, often requiring expensive replacements (typically $2,000 $4,000 per turbo). Common failure points include the wastegate and bearings.

3. **Carbon Buildup**

Turbocharged engines are susceptible to carbon deposits in the intake valves and combustion chamber. This can lead to rough idling, misfires, and reduced performance. Regular carbon cleaning (every 30,000 50,000 miles) is recommended but adds to maintenance costs.

4. **Complexity of Maintenance**

The 4.8L engine requires specialized knowledge for servicing, such as turbo tuning, fuel system adjustments, and cooling system checks. DIY maintenance is challenging for non-experienced owners.

5. **Fuel Efficiency**

The 4.8L Turbo engine is not fuel-efficient, averaging around 12 16 MPG in the city and 16 20 MPG on the highway. High fuel consumption adds to long-term operating costs.

6. **Depreciation**

While the Cayenne holds value better than some luxury SUVs, it still depreciates significantly over time. Buyers should be prepared for a substantial loss in value after a few years.

7. **Weight and Practicality**

The Cayenne is a large, heavy vehicle (around 5,000 5,500 lbs), which can make it less practical for urban driving or tight parking spaces. The high ride height also affects maneuverability.

8. **Common Electrical and Software Issues**

Porsche s Cayenne models (especially older ones) have had reports of electrical gremlins, such as faulty sensors, infotainment glitches, and issues with the PDK transmission (if equipped). These can be frustrating to diagnose and repair.

9. **Limited Availability of Parts**

While parts are available, some specialized components (e.g., turbochargers, sensors) may have long lead times, especially for older model years.

10. **Noise and Vibration**

The 4.8L Turbo engine can be noisy, particularly at higher RPMs, and may transmit more vibration into the cabin compared to smoother engines. The turbo lag can also be noticeable, especially in stop-and-go traffic.

---

### **Ending Conclusion**

The **Porsche Cayenne (08-10) with a 4.8L Turbo engine (50257L driver cylinder head)** is a powerful and luxurious SUV that offers strong performance, towing capability, and a sporty driving experience. However, it comes with significant drawbacks, particularly in terms of **high maintenance costs, turbocharger reliability issues, fuel inefficiency, and complex servicing requirements**. This vehicle is best suited for buyers who:

- Have a budget for ongoing maintenance and repairs.

- Prioritize performance and luxury over fuel economy.

- Are prepared to invest in regular upkeep (e.g., turbo tuning, carbon cleaning, oil changes).

- Plan to use the vehicle for occasional towing or long-distance driving rather than daily commuting.

For buyers who are not financially prepared for the challenges of owning a high-performance Porsche SUV, alternatives like a **used 911 Turbo (with a more reliable engine), a BMW X5, or a Mercedes GLE** might offer a better balance of practicality and performance.

### **Recommendation**

1. **Get a Pre-Purchase Inspection (PPI)** from a Porsche specialist or a trusted mechanic to assess the condition of the turbochargers, carbon buildup, and overall engine health.

2. **Verify maintenance records** to ensure the engine has been properly serviced, including oil changes, turbo inspections, and carbon cleaning.

3. **Budget for future repairs**, particularly for turbochargers and fuel system components. Set aside at least **$5,000 $10,000 annually** for maintenance if you plan to keep the vehicle long-term.

4. **Consider a lower-mileage example** (under 60,000 miles) to reduce the risk of turbo failure and carbon buildup.

5. **Explore aftermarket support** to extend the life of the engine, such as upgrading to a **Garrett GTX turbo** or installing a **high-flow fuel system**.

6. **Be prepared for depreciation** this is not an investment vehicle but rather a passion project for Porsche enthusiasts.

If you are **not financially or mechanically equipped** to handle the challenges of this engine, consider a more practical or lower-maintenance alternative. The Cayenne s 4.8L Turbo is a fantastic engine for those who love performance and are willing to put in the effort to keep it running smoothly.

Details:

Body parts are sold as is. PORSCHE CAYENNE 08-10 4.8L, w/turbo engine, L.

part #: 306-50257l prices

• $750.00-$1036.00

specifications cylinderheapar:

• for models: Turbo, Cayenne
• for makes: Porsche
• for years: 2008-2010
• model: Cayenne
• part type: Driver Cylinder Head Engine
• conditions options: Lh, Cylinder Head, Off And Ready To Go
• genuine oem: Yes
• ipn: 306-50257l
• placement: Driver/left
• year: 2009

seller cylinderheapar:

• city: Taylor, Michigan
• rating: 95.6%
• # reviews: 1186

shipping cylinderheapar:

• transit: 4-7 Days
• cost: $164.61
• class: Standard
• type: Calculated
• service: UPS Ground
• carrier: UPS

returns cylinderheapar:

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

offer cylinderheapar:

• sold: 0
• options: Ship-to-home
• quantity: 1
• started: February 21, 2026
• availability: In Stock

general cylinderheapar:

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

payments cylinderheapar:

• other
• credit card: Discover
• wallet: Paypal

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