BMW 11128643182 Cylinder Head Port B58

( Manufacturer Part Number: 11128643182 ), ( Type: Cylinder Head ), ( Material: Aluminum )

Review BMW B58 Gen Cylinder Head Port

The **BMW B58 Gen 1 cylinder head port** (part number **11128643182**) is a precision-engineered component designed exclusively for BMW s high-performance inline-6 engine architecture, specifically the **B58** the turbocharged powerplant found in vehicles like the **M235i, M240i, 435i, 440i, and 550i** (F10, G20, G30, and G32 body styles). This port is a critical part of the cylinder head assembly, responsible for directing intake and exhaust gases with optimal flow dynamics to maximize engine efficiency, power output, and responsiveness. Crafted from **high-grade aluminum alloy**, it is machined to exacting tolerances to ensure minimal turbulence and maximum volumetric efficiency, allowing the engine to breathe freely under both low-end torque and high-revving conditions. The design incorporates **smooth, contoured passages** that minimize restriction while maintaining structural integrity, even under the extreme pressures generated by the twin-scroll turbocharging system. This port is integral to the **direct-injection fueling strategy** of the B58, as it helps optimize the mixing of air and fuel for precise combustion, reducing knock risk and improving thermal efficiency. Whether used in stock applications or as part of a performance upgrade such as a **turbocharger swap, intake manifold modification, or cylinder head porting project** this component ensures that the engine operates at its intended performance level while maintaining reliability. Its compatibility with aftermarket tuning solutions makes it a sought-after part for enthusiasts looking to enhance their B58 s breathing capacity without compromising on durability or factory specifications.

### **Pros and Cons of Buying a BMW B58 Gen 1 Cylinder Head (Part Number: 11128643182) for a B58 Engine**

1. **OEM Quality and Reliability** BMW s B58 engine is known for its robust construction, and the cylinder head is designed to meet strict emissions and performance standards. A genuine part ensures proper sealing, cooling, and combustion efficiency.

2. **Compatibility with High-Performance Modifications** The B58 Gen 1 head is widely used in tuning applications, including forced induction builds (turbo/supercharger). Its robust design can handle higher boost pressures when properly supported with upgraded internals (e.g., forged pistons, stronger rods).

3. **Aftermarket Support** Due to the B58 s popularity, there is a strong aftermarket presence for cylinder heads, including porting services, upgraded valves, and high-flow internals. This makes it easier to optimize performance or address wear.

4. **Durability with Proper Maintenance** If the head is in good condition (no cracks, intact valve seats, and intact combustion chambers), it can last the lifespan of the engine with regular maintenance (timely valve adjustments, proper cooling, and oil changes).

5. **Resale Value for Tuned Engines** If you plan to keep the car for performance use, a well-maintained B58 head retains value in the tuning community, especially if paired with a reliable engine build.

6. **Easier to Source Than Some Alternatives** While not as common as older N5x/N6x heads, the B58 Gen 1 is still widely available from BMW dealers, authorized remanufacturers, and reputable aftermarket suppliers.

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1. **Higher Cost Compared to Remanufactured or Aftermarket Heads** A new OEM cylinder head for the B58 can be expensive, often costing **$1,500 $2,500 ** depending on the supplier. Remanufactured or aftermarket alternatives (e.g., from companies like **BMW Performance Parts, JE, or Euro Car Parts**) may offer similar quality at a lower price.

2. **Potential for Hidden Damage** If purchasing used or from a salvage yard, there is a risk of **hidden cracks (especially around the valve cover or oil passages), warped decks, or worn valve seats**. Always inspect for:

- **Cracks** (use dye penetrant or an ultrasonic test).

- **Warpage** (check deck flatness with a straightedge).

- **Valve seat wear** (can lead to oil burning or misfires).

- **Intact combustion chambers** (scuffing or erosion reduces performance).

3. **Limited Long-Term Data on Aging** The B58 Gen 1 is relatively new (introduced 2014), so long-term reliability data is still emerging. Some owners report **valve seat recession** or **warpage** under high boost or aggressive tuning, which may require more frequent maintenance.

4. **Complex Installation** Replacing a cylinder head requires **specialized tools (e.g., torque wrench, gasket scraper, head gasket removal tools), proper sealing (new head gaskets, gasket maker), and precise torque specs**. Improper installation can lead to **leaks, compression loss, or even catastrophic failure**.

5. **Potential for Emissions Issues** If the head is not properly ported or if internals (e.g., valves, springs) are worn, it may fail **smog checks or emissions testing** in regions with strict regulations. Some aftermarket ports may require **EGR or DPF modifications** to comply.

6. **Weight and Space Considerations** The B58 Gen 1 head is heavier than some aftermarket alternatives (e.g., **JE or Euro Car Parts ported heads**), which can slightly reduce power in high-RPM applications if not paired with a lighter crankshaft or flywheel.

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Buying an **OEM B58 Gen 1 cylinder head (11128643182)** is a solid choice if you prioritize **reliability, OEM support, and long-term durability**, especially for a **stock or mildly tuned engine**. However, if you are **aggressively tuning (high boost, forced induction, or extreme power levels)**, a **remanufactured or aftermarket ported head** (from trusted brands like **JE, Euro Car Parts, or BMW Performance Parts**) may offer better value with improved airflow and longevity.

For **budget-conscious buyers**, a **remanufactured OEM head** (from a reputable shop like **BMW Performance Parts or Euro Car Parts**) can be a cost-effective alternative while still maintaining high quality. Always **inspect for cracks, warpage, and valve condition** before purchasing, and consider **upgrading internals (valves, springs, retainers)** if pushing for high performance.

- Purchase a **new or remanufactured OEM B58 Gen 1 head** from an authorized BMW dealer or trusted remanufacturer.

- Ensure it is **crack-tested and inspected** before installation.

- Use **high-quality gaskets (e.g., Fel-Pro or BMW OEM)** and follow **precise torque specs**.

- Consider a **ported and upgraded aftermarket head** (e.g., **JE or Euro Car Parts**) for better airflow and durability.

- Pair it with **forged internals (pistons, rods, crank)** and **high-flow valves** to prevent failure.

- Get the head **professionally ported and inspected** before installation.

- **Avoid heads with visible cracks, warping, or burnt valve seats.**

- **Test for compression and leaks** before purchasing.

- **Get a pre-purchase inspection** from a BMW specialist.

Ultimately, the best choice depends on your **budget, tuning goals, and whether you prioritize OEM reliability or aftermarket performance gains**. For most **stock-to-mildly-tuned** applications, the OEM head is a **safe and reliable** option, while tuners should weigh the **cost vs. performance benefits** of aftermarket alternatives.

Details:

The B58 Gen 2 Cylinder Head 6 Port is a high-quality engine part designed specifically for BMW vehicles. Made from durable aluminum material, this cylinder head features a 6 port design for improved performance. With both cams. With a manufacturer part number of, it ensures perfect fit and reliable function for your vehicle.

part #: 11128643182 prices

• $1699.95-$4999.95

specifications cylinderheapar:

• for makes: Bmw
• mpn: 11128643182
• type: Cylinder Head
• material: Aluminum

seller cylinderheapar:

• rating: 100.0%
• # reviews: 40
• city: Costa Mesa, California

general cylinderheapar:

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

payments cylinderheapar:

• money order
• wallet: Paypal
• credit card: Discover
• other

offer cylinderheapar:

• sold: 0
• availability: In Stock
• best offers: True
• options: Ship-to-home
• quantity: 1
• started: February 23, 2026

shipping cylinderheapar:

• transit: 4-8 Days
• carrier: USPS
• cost: $99.54
• class: Standard
• type: Calculated
• service: USPS Ground Advantage

returns cylinderheapar:

• policy: No Returns

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