GENUINE GM PARTS 12641095 Engine Cylinder Head 195491210509

( Brand: Genuine Gm Parts ), ( Manufacturer Part Number: 12641095 ), ( Manufacturer Warranty: 1 Year ), ( Core Charge: 75.00 Which Is Included In The Total Price ), ( Type: Engine Cylinder Head Assembly ), ( UPC: 195491210509 )

Review GENUINE GM PARTS Engine Cylinder Head Assembly

The **GM 12641095 Engine Cylinder Head** is a precision-engineered component designed specifically for high-performance and durability in General Motors small-block V8 engines, particularly those found in classic and modern applications such as the Chevrolet Corvette, Camaro, and Impala. Crafted from high-quality cast iron, this cylinder head is built to withstand extreme operating temperatures, high compression ratios, and the demands of forced induction or high-performance tuning, making it an ideal choice for both stock and modified engines. The head features a robust, symmetrical design with integrated combustion chambers that optimize airflow and combustion efficiency, ensuring better power output and fuel economy while maintaining reliability. Its compact yet robust structure includes precision-machined valve seats, guide bores, and a robust rocker arm mounting surface, all of which contribute to smoother valve operation and reduced wear over time. The head is equipped with standard 1.5875-inch pushrod bores and 1.9375-inch valve guide bores, allowing for compatibility with a wide range of camshafts, valves, and rocker arm setups, whether stock or aftermarket. Additionally, the integrated spark plug holes and threaded ports for oil and coolant passages ensure proper lubrication and thermal management, preventing overheating and extending the lifespan of the engine. Whether used in a restored classic muscle car or a modern performance application, this cylinder head delivers a balance of strength, efficiency, and adaptability, making it a trusted component for enthusiasts and mechanics alike who demand both performance and longevity.

### **Pros and Cons of Buying a GM 12641095 Engine Cylinder Head**

1. **Compatibility and Availability** The GM 12641095 cylinder head is widely used in various General Motors engines, including the **LS1, LS2, LS3, and LS6** (depending on application). This means it is relatively easy to source, either new or used, from GM dealerships, aftermarket suppliers, or online marketplaces.

2. **Proven Reliability** GM s LS-series engines are known for durability, and the 12641095 head is part of a well-tested design. If properly maintained, it can last for hundreds of thousands of miles, especially in high-performance applications.

3. **Aftermarket Support** Due to its popularity, there is a strong aftermarket presence offering upgrades such as **high-flow intake and exhaust manifolds, custom valve springs, and performance camshafts**. This allows for easy modifications if tuning or increased power is desired.

4. **Cost-Effective Replacement Option** Compared to some high-performance or specialty heads, the 12641095 is reasonably priced, especially when purchasing used or from a reputable salvage yard. This makes it a cost-effective choice for restorations or engine rebuilds.

5. **Easy to Work On** The design is straightforward, with accessible components like valves, springs, and rocker arms. This makes maintenance, repairs, and modifications more manageable for both professionals and DIY enthusiasts.

6. **Long-Term Performance Potential** With proper maintenance (valve adjustments, head gasket replacement, and cooling system checks), these heads can maintain performance over extended periods, making them a solid long-term investment.

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1. **Potential for Wear and Tear** Like any high-performance component, the 12641095 head can suffer from **valve seat recession, warping, or exhaust port erosion** over time, especially in high-mileage or heavily modified engines. This may require frequent inspections and refurbishments.

2. **Head Gasket Failures** GM LS engines are prone to **head gasket leaks**, particularly if the engine runs hot or experiences excessive pressure. A failed head gasket can lead to coolant mixing with oil, reducing lubrication and causing catastrophic engine damage if not addressed promptly.

3. **Thermal Management Challenges** The LS-series heads can overheat if the cooling system is inadequate (e.g., weak water pump, clogged radiator, or insufficient coolant). Poor thermal management can lead to **warping, valve seat damage, or even head failure**.

4. **Cost of Rebuilding vs. Replacement** While the head itself may be affordable, **rebuilding it professionally** (including machining, valve job, and sealing) can be expensive. In some cases, it may be more cost-effective to replace the entire head rather than rebuild it multiple times.

5. **Limited Longevity in Extreme Conditions** In **high-horsepower applications (e.g., forced induction or extreme boost levels)**, the stock 12641095 head may not hold up long-term without significant modifications (e.g., upgraded valves, stronger springs, or a custom head). This can limit its usefulness in high-performance builds without additional investment.

6. **Availability of OEM Parts** While the head itself is common, **OEM replacement parts (such as valves, springs, or rocker arms) may be harder to find** over time, increasing reliance on aftermarket alternatives.

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### **Conclusion**

The **GM 12641095 cylinder head** is a **solid, reliable, and cost-effective choice** for LS-series engine applications, especially for stock or mildly modified builds. Its **wide availability, strong aftermarket support, and proven durability** make it a practical option for restorations, rebuilds, and performance upgrades. However, **proper maintenance, thermal management, and occasional refurbishment** are essential to prevent common issues like **head gasket failures, warping, and valve seat wear**.

For **high-performance or extreme applications**, additional modifications (such as **custom heads, upgraded internals, or forced induction support**) may be necessary to maximize longevity and performance. If the engine sees **heavy use or aggressive modifications**, budgeting for **regular inspections and potential rebuilds** will be crucial.

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### **Recommendation**

- **For Stock or Mildly Modified Engines:** The 12641095 head is an **excellent choice**, especially if sourced from a **reputable salvage yard or OEM supplier**. Ensure proper **cooling system maintenance, regular valve adjustments, and head gasket checks** to extend its lifespan.

- **For High-Performance or Forced Induction Builds:** Consider **upgrading to a custom or high-flow head** (such as those from **LS Swap or Edelbrock**) to handle increased stress. Pair it with **reinforced internals (valves, springs, retainers)** and a **robust cooling solution** to prevent failure.

- **If Rebuilding:** Weigh the cost of **professional machining and refurbishment** against purchasing a **used but serviceable head** from a trusted source. In some cases, a **pre-built or remanufactured head** may be more cost-effective than a DIY rebuild.

- **Always Verify Compatibility:** Double-check that the **12641095 head matches your specific engine application** (e.g., LS1 vs. LS3) to avoid mismatched components.

**Final Verdict:** The GM 12641095 cylinder head is a **strong, practical option** for LS-series engines, but its success depends on **proper care, maintenance, and application awareness**. For most enthusiasts, it offers a **good balance of reliability and performance** at a reasonable cost.

Details:

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part #: 12641095 prices

• $747.40-$1415.03

specifications cylinderheapar:

• brand: Genuine Gm Parts
• mpn: 12641095
• manufacturer warranty: 1 Year
• core charge: 75.00 Which Is Included In The Total Price
• type: Engine Cylinder Head Assembly
• upc: 195491210509

offer cylinderheapar:

• sold: 0
• availability: In Stock
• quantity: 5
• started: May 16, 2026
• options: Ship-to-home

returns cylinderheapar:

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

seller cylinderheapar:

• rating: 99.2%
• city: Garland, Texas
• # reviews: 19122

shipping cylinderheapar:

• class: Standard
• type: Fixed
• transit: 18-28 Days
• cost: $0.00
• service: Standard

general cylinderheapar:

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

payments cylinderheapar:

• other
• credit card: Diners-club
• wallet: Google-pay

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