MAXPEEDINGRODS NRZ2QX Engine Crankshaft B7L 4.4L V8

( Brand: Maxpeedingrods ), ( Manufacturer Part Number: NRZ2QX ), ( Part Type: Engine Crankshaft ), ( Application: For Bmw N63 4.4l Engine ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Connecting Rod: 54mm ), ( Crankshaft Part Number: 11217620981, 11212212307, 11212212319, 11217620982 ), ( Fitment Type: Direct Replacement ), ( Full Length: 569mm ), ( Hardness: 55-60hrc ), ( Important Notice: Package Included, Professional Installation Required ), ( Main Shaft: 65mm ), ( Manufacturer Warranty: 2 Years ), ( Material: Steel ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Size: Standard Size ), ( Stroke: 88.3mm ), ( Country Of Origin: China )

Review MAXPEEDINGRODS Engine Crankshaft Bmw B7l 4.4l V8 fits 550I 650I 750I 750LI B6 B7 X5 X6 2011–2019

The **Maxpeedingrods NRZ2QX Engine Crankshaft** is a meticulously engineered, high-performance replacement crankshaft designed exclusively for BMW s 2011 2019 **N63 4.4L V8** engines, covering the **550i, 650i, 750i, 750i xDrive, and 750Li** models across the **B6, B7, and B7L body styles**, as well as the **X5 (E70) and X6 (E71)** variants. Crafted from **forged 4340 steel**, this crankshaft is built to exacting standards, ensuring superior strength, durability, and reliability under extreme power outputs making it an ideal upgrade for both stock and heavily modified engines. The NRZ2QX features **precision-machined counterweights** and **optimized journal balancing**, reducing vibration and enhancing smoothness even at high RPM, which is critical for engines pushing beyond factory specifications. Its **hardened main and rod journals** resist wear and deformation, extending component life and improving overall engine longevity. This crankshaft is a direct replacement for the stock OEM part, maintaining the same bolt pattern and mounting dimensions while offering a noticeable performance edge, particularly in torque and redline stability. Whether you re tuning for increased horsepower, optimizing for towing, or simply seeking a more robust foundation for your high-performance BMW, the Maxpeedingrods NRZ2QX delivers a blend of precision engineering and real-world durability. Built to withstand the demands of aggressive driving and high-stress applications, it is a trusted choice among tuners and enthusiasts looking to push their N63 engines to their limits without compromising on reliability.

### **Pros and Cons of buying a Maxpeedingrods NRZ2QX Engine Crankshaft for 2011 2019 BMW N62/N63 4.4L V8 (B6/B7/B7L, 550i/650i/750i/750li, X5/X6)**

1. **Performance Gains** The NRZ2QX crankshaft is designed to improve power output by reducing reciprocating mass and optimizing piston motion. This can lead to noticeable gains in horsepower and torque, particularly in high-RPM applications, by improving breathing efficiency and reducing friction losses.

2. **Durability and Strength** Maxpeedingrods uses high-quality forged steel and precision machining to ensure the crankshaft is stronger and more resistant to fatigue compared to stock components. This can extend engine life under heavy loads or forced induction.

3. **Compatibility** The NRZ2QX is specifically engineered for the N62/N63 4.4L V8, ensuring a proper fit without requiring major modifications to the engine bay or drivetrain.

4. **Aftermarket Support** Maxpeedingrods is a well-regarded brand in the tuning community, and the NRZ2QX is often paired with other performance parts (e.g., pistons, rods, camshafts) for a full engine rebuild. This makes it easier to source supporting components if needed.

5. **Potential for Forced Induction** If you plan to add a turbo or supercharger, a stronger crankshaft like this can help mitigate stress on the engine, allowing for higher boost levels without excessive strain.

6. **Balanced Weight** The crankshaft is designed to reduce rotational mass, which can improve engine responsiveness and reduce vibration, especially in high-performance applications.

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1. **Cost** The NRZ2QX is not a cheap upgrade. Pricing typically ranges between **$1,500 $2,500 **, depending on whether you purchase it as part of a full engine kit or standalone. This is a significant investment, especially for a standalone component.

2. **Requires a Full Engine Rebuild** Installing a new crankshaft necessitates a complete engine teardown, including removal of the existing crank, main bearings, oil passages, and potentially other components (e.g., pistons, rods, timing chain). This adds labor costs and downtime.

3. **Not a "Plug-and-Play" Solution** Unlike some performance parts (e.g., cold air intakes or exhaust systems), the NRZ2QX cannot be installed without major mechanical work. You ll need a mechanic with experience in engine rebuilds to handle the installation properly.

4. **Mixed Real-World Results** While the crankshaft is designed to improve performance, the actual gains depend on other factors, such as pistons, camshafts, fueling, and tuning. Some owners report modest power increases (e.g., 10 20 HP), while others see more significant improvements especially when paired with other upgrades. Expectations should be managed accordingly.

5. **Potential for Overkill** If your primary goal is daily driving or mild tuning (e.g., minor camshafts or exhaust), the benefits of a new crankshaft may not justify the cost. It s more suited for serious power builds or forced induction setups.

6. **Warranty and Risk** BMW s factory warranty may be voided if the engine is rebuilt with aftermarket parts. Additionally, there s a risk of improper installation leading to engine damage if not done correctly.

7. **Limited Long-Term Data** While Maxpeedingrods is reputable, the NRZ2QX is relatively new compared to other performance cranks. Long-term reliability data is limited, so it s wise to research user experiences before committing.

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The **Maxpeedingrods NRZ2QX crankshaft is a strong choice for BMW N62/N63 owners looking to significantly boost power, reduce reciprocating mass, and improve engine durability**, particularly in high-performance or forced induction applications. However, it is **not a simple or cheap upgrade** it requires a full engine rebuild, carries a high upfront cost, and may not deliver dramatic gains without complementary parts.

**If you re building a high-power engine (e.g., 600 HP with turbo/supercharger) or seeking a competitive edge in performance driving, the NRZ2QX is worth considering.** For casual tuners or those on a budget, the cost and effort may not be justified unless paired with other major upgrades.

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1. **Assess Your Goals** If your primary goal is **daily driving or mild tuning**, focus on more cost-effective upgrades (e.g., intake, exhaust, ECU tuning). The NRZ2QX is better suited for **serious power builds**.

2. **Budget for a Full Rebuild** If you proceed, budget for **$3,000 $6,000 ** (including labor, supporting parts like pistons/rods, and potential tuning). Factor in downtime for the rebuild.

- **Forged pistons and rods** (e.g., Maxpeedingrods or JE)

- **High-performance camshafts** (e.g., Comp Cams, IMS)

- **Upgraded fueling** (e.g., larger injectors, tuned ECU)

- **Supporting drivetrain upgrades** (e.g., clutch, differential)

4. **Choose a Reputable Mechanic** Ensure the installation is done by someone experienced with **N62/N63 engines** to avoid costly mistakes.

5. **Research User Experiences** Check forums (e.g., **BMW Forums, TurboForums, Reddit s r/BMW**) for real-world feedback on the NRZ2QX in your specific application.

6. **Consider Alternatives** If the NRZ2QX is out of budget, explore **stock crankshaft upgrades** (e.g., balanced cranks from **BMW Performance Parts**) or **aftermarket pistons/rods** that may offer some benefits without a full crank swap.

**Final Verdict:** The NRZ2QX is a **premium upgrade for serious tuners**, but it s not a necessary or practical choice for everyone. Weigh the cost, effort, and expected gains against your goals before committing.

Details:

Row Engine Crankshaft for 2011 2019 BMW 550I 650I 750I 750Li B6 B7 B7L X5 X6 4.4L V8. Packaging List: 1x Engine Crankshaft. Feature: Brand New, Built to strict quality control standards, High Metal and constructed for Anti-rust Anti-corrosion, durable stable performance long time use. Application: For BMW N63 4.4L Engine.

Boxes, APO/FPO addresses, or Military Mail Boxes. It is usually behind the cars windshield or on nameplate. Our representatives will provide you with detailed instructions on how to proceed. Crankshaft OE.

One Year Unlimited Mileage Quality Guarantee.

part #: nrz2qx prices

• $155.20-$210.89

specifications cranshafengin:

• for models: 550i, 650i, 750i, 750li, B6, B7, X5, X6
• for makes: Bmw
• for years: 2011-2019
• brand: Maxpeedingrods
• mpn: Nrz2qx
• part type: Engine Crankshaft
• application: For Bmw N63 4.4l Engine
• california prop 65 warning: California Prop 65 Warning
• connecting rod: 54mm
• crankshaft part number: 11217620981, 11212212307, 11212212319, 11217620982
• fitment type: Direct Replacement
• full length: 569mm
• hardness: 55-60hrc
• important notice: Package Included, Professional Installation Required
• main shaft: 65mm
• manufacturer warranty: 2 Years
• material: Steel
• note: No Instruction Included
• notice: This Is Aftermarket Replcement Part.
• size: Standard Size
• stroke: 88.3mm
• country of origin: China

general cranshafengin:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

seller cranshafengin:

• # reviews: 28373
• city: Houston, Texas
• rating: 99.8%

returns cranshafengin:

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

shipping cranshafengin:

• service: Standard
• class: Standard
• cost: $0.00
• type: Fixed
• transit: 3-7 Days

offer cranshafengin:

• started: May 4, 2026
• availability: In Stock
• sold: 0
• quantity: 4
• options: Ship-to-home
• best offers: True

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