SUBARU 11039AB550 Right Cylinder Head Tribeca Gas 3.0

( Manufacturer Part Number: 11039AB550 ), ( Fitment Type: Direct Replacement ), ( Mounting Hardware Included: No ), ( Manufacturer Warranty: 30 Days ), ( Type: Right Cylinder Head ), ( Engine Size: 3.0 ), ( Valvetrain Iteration: Dohc ), ( Transmission Type: Automatic ), ( Location Id: 3g02 ), ( Vehicle Id: 16761 )

Review SUBARU Right Cylinder Head Tribeca 3.0 Gas fits B9 2006–2007

The **Subaru 11039AB550 Right Cylinder Head** is a precision-engineered component designed specifically for the **2006 2007 Subaru Tribeca (B9) 3.0L naturally aspirated (NA) gasoline engine**, ensuring optimal performance, reliability, and longevity. This high-quality cylinder head is crafted from durable **cast aluminum alloy**, a material chosen for its excellent heat dissipation properties and resistance to thermal stress, which is critical for maintaining consistent compression and combustion efficiency in high-performance applications. The head features a **right-hand orientation**, aligning perfectly with the engine s firing order and cylinder layout, eliminating the need for modifications or adjustments during installation. Engineered to meet or exceed OEM specifications, this part includes **accurately machined combustion chambers, precise valve seats, and optimized port geometry** to enhance airflow and fuel efficiency, contributing to smoother operation and reduced emissions.

The **11039AB550** cylinder head is compatible with the **EJ255 (3.0L) engine**, which powers the Tribeca s V6 configuration, and is designed to work seamlessly with the stock intake and exhaust manifolds, as well as the factory camshafts and valves. Its **integrated valve cover mounting points** ensure a secure fit, while the **threaded spark plug holes** and **oil passage pathways** are meticulously aligned to prevent leaks and maintain proper lubrication. For enthusiasts looking to push their Tribeca s limits, this head can also serve as a solid foundation for **upgrades such as high-flow intake and exhaust systems, performance camshafts, or even forced induction modifications**, provided the supporting components are appropriately matched. Whether used in a restoration project, a reliability upgrade, or as a replacement for a worn or damaged OEM part, this cylinder head delivers the durability and performance Subaru drivers expect from their vehicles.

Built to withstand the demands of daily driving as well as spirited acceleration, the **11039AB550** is a **direct replacement part**, meaning it installs without the need for additional gaskets, seals, or conversion kits, saving time and effort during installation. Its **heat-treated construction** ensures dimensional stability under high-temperature conditions, reducing the risk of warping or distortion that can lead to poor sealing or valve issues. Additionally, the head s **precision-machined surfaces** including the **camshaft bearing caps and lifter bores** help maintain proper valve train alignment, reducing wear on the pushrods, rocker arms, and valves over time. For those performing a full engine rebuild or addressing specific performance concerns, this cylinder head is an excellent choice, offering a balance of **cost-effectiveness, compatibility, and performance potential** for the 2006 2007 Subaru Tribeca s 3.0L engine.

### **Pros and Cons of Buying a Used Subaru 11039AB550 Right Cylinder Head for a 2006-2007 B9 Tribeca 3.0L Gas Engine**

1. **Direct Fitment** The **11039AB550** is the correct cylinder head for your **2006-2007 Subaru B9 Tribeca 3.0L gas engine**, ensuring compatibility without modifications.

2. **OEM Quality** Being a genuine Subaru part, it meets the manufacturer s specifications, reducing the risk of premature failure or poor performance.

3. **Reliability** Subaru s aluminum cylinder heads are durable when properly maintained, and a used one in good condition can last for years with proper sealing and cooling.

4. **Cost-Effective Alternative** Purchasing a used head is significantly cheaper than buying new, making it a budget-friendly option for repairs.

5. **Potential for Long-Term Use** If the head is in good condition (no cracks, warping, or excessive wear), it can serve as a reliable long-term replacement.

6. **Easier to Source** Since it s a common part for older Subarus, finding a used one is relatively straightforward compared to rare or discontinued components.

1. **Unknown Service History** Without full documentation, you won t know if the head has been previously damaged, cracked, or improperly installed, which could lead to future issues.

- **Warping** (common in aluminum heads due to overheating).

- **Exhaust port erosion** (from carbon buildup or incorrect valve adjustments).

- **Cracking** (especially around the valve cover or oil passages).

- **Worn valve seats or guides** (leading to leaks or poor sealing).

3. **Sealing Issues** Gaskets, bolts, and surfaces may be degraded, requiring additional labor to ensure a proper seal.

4. **Compatibility Risks** Even if the part number matches, slight variations in manufacturing (e.g., bolt patterns, gasket designs) could cause fitment problems if not inspected.

5. **No Warranty** Unlike a new part, a used cylinder head typically comes with no warranty, meaning you bear full responsibility for any failures post-installation.

- A new head gasket.

- New bolts (if they were reused or improperly torqued).

- Coolant and lubricants for reassembly.

- Professional labor if you lack experience with head work.

- **Cracks** (use dye penetrant or a magnifying inspection).

- **Warping** (check valve seats and deck surface with a straightedge).

- **Valve and seat condition** (ensure no excessive wear or pitting).

- **Thread integrity** (check bolt holes for stripping).

- **Source Reputation** Buy from a trusted seller (e.g., a junkyard with inspection reports, an online marketplace with verified feedback, or a mechanic who performs head work).

- **Remanufactured heads** (some aftermarket suppliers offer rebuilt heads with warranties).

- **New OEM or high-quality aftermarket heads** (if budget allows, this eliminates risk).

- **Repairing the existing head** (if the damage is minor, such as valve seat replacement).

---

Buying a **used Subaru 11039AB550 cylinder head** for your **2006-2007 B9 Tribeca 3.0L** can be a **cost-effective solution** if you find a high-quality, well-maintained part. However, the **risks of hidden damage, improper sealing, or compatibility issues** make it a **high-stakes gamble** unless you thoroughly inspect the head or have it professionally checked before purchase.

If you are **mechanically inclined and willing to invest time in inspection and reassembly**, a used head can be a viable option. If you **prioritize reliability and want to avoid potential headaches**, a **new or remanufactured head** (even at a higher cost) is the safer choice.

---

- **Purchase from a reputable junkyard or salvage yard** that provides inspection reports or allows for a pre-purchase inspection.

- **Budget for additional costs** (new gasket, bolts, coolant, and potential labor if reassembling).

- **Inspect the head yourself** (or have a trusted mechanic verify its condition) before buying.

- **Consider a remanufactured head** if available, as it often comes with a warranty and is closer to new condition.

- **Buy a new OEM or aftermarket cylinder head** (e.g., from **Subaru, ACDelco, or a trusted supplier like RockAuto**).

- **Invest in professional installation** to ensure proper gasket sealing and torque specifications.

- **This eliminates risk but may cost 2-3x more than a used part.**

- **Avoid purchasing without inspection** many used heads fail due to unseen damage.

- **Consider alternative fixes** (e.g., repairing the existing head if the issue is localized, such as valve seat replacement).

**Final Verdict:** A used head *can* work, but **only if you are prepared for the risks and have the means to verify its condition**. For most drivers, **prioritizing quality over cost** (via a new or remanufactured head) is the best long-term strategy.

Details:

Subaru Legacy 2006 2009 3.0L. Subaru B9 Tribeca 2006 2007 3.0L. Please replace such items as required for proper installation. Subaru Outback 2005 2009 3.0L.

part #: 11039ab550 price

• $499.95

specifications cylinderheapar:

• for models: B9
• for makes: Subaru
• for years: 2006-2007
• mpn: 11039ab550
• fitment type: Direct Replacement
• mounting hardware included: No
• manufacturer warranty: 30 Days
• type: Right Cylinder Head
• engine size: 3.0
• valvetrain iteration: Dohc
• transmission type: Automatic
• location id: 3g02
• vehicle id: 16761

payments cylinderheapar:

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

general cylinderheapar:

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

returns cylinderheapar:

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

seller cylinderheapar:

• # reviews: 69556
• rating: 99.8%
• city: Denver, Colorado

offer cylinderheapar:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 6, 2026

shipping cylinderheapar:

• service: Standard
• type: Fixed
• transit: 4-6 Days
• cost: $0.00
• class: Standard

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