PORSCHE 9971020218D Crankshaft Crank 4.0 80.4 0.25/0.25

( Manufacturer Part Number: 9971020218D ), ( Part Type: Crankshaft Crank )

Review PORSCHE 4.0 Liter 80.4mm Crankshaft 0.25/0.25 Crank fits MARINE 911

Porsche 997 911 4.0 (80.4) Crankshaft (0.25/0.25 Marine Crank) - Exceptional Quality and Precision for High-Performance Engines

The Porsche 997 911 4.0 (80.4) Crankshaft (0.25/0.25 Marine Crank) is a premium automotive part designed for high-performance applications, specifically for Porsche 911 models. This crankshaft offers both style and unparalleled performance, making it an ideal choice for enthusiasts and professionals alike.

This marine crankshaft is a direct fit for the Porsche 997 series, ensuring seamless integration with your vehicle's engine. The 0.25/0.25 design provides optimal balance and rigidity, reducing vibration and improving overall engine performance. The crank's precision-machined construction ensures superior durability and reliability, even under the most demanding conditions.

The Porsche 997 911 4.0 (80.4) Crankshaft (0.25/0.25 Marine Crank) is meticulously crafted to meet the exacting standards of Porsche engineering. The marine-grade material used in its construction offers excellent resistance to corrosion, ensuring longevity and maintaining the crank's peak performance over time.

This replacement crankshaft is an excellent choice for those seeking to upgrade their Porsche 911's engine performance or for those who require a high-quality spare part. With its exceptional quality, precision engineering, and durable construction, the Porsche 997 911 4.0 (80.4) Crankshaft (0.25/0.25 Marine Crank) is a smart investment for any Porsche enthusiast or professional mechanic. Upgrade your Porsche 911 today with this top-tier crankshaft and experience the difference precision engineering can make.

Analysis of Purchasing a Porsche 997 911 4.0 Crankshaft (0.25/0.25 Marine Crank)

1. High-Quality Material: The crankshaft is made of marine-grade material, which is known for its durability and resistance to corrosion, ensuring long-lasting performance.

2. Precision Manufacturing: The 0.25/0.25 design suggests a close tolerance, indicating a high level of precision in the manufacturing process, which can contribute to improved engine performance.

3. Potential for High Performance: As this crankshaft is from a high-performance car like the Porsche 911, it may offer enhanced power and responsiveness when installed in the right engine.

1. Compatibility Issues: Without knowing the specific engine this crankshaft is intended for, there could be potential compatibility issues if it's not a direct fit for your vehicle.

2. Lack of Warranty: Since this seems to be an aftermarket part, it may not come with a manufacturer's warranty, which could leave you responsible for any unexpected repairs or replacements.

3. Potential for Overkill: If you're not planning on using this crankshaft for performance modifications, you might be spending money on a part that won't significantly improve your driving experience.

Investing in a Porsche 997 911 4.0 Crankshaft (0.25/0.25 Marine Crank) could potentially provide you with a high-quality, durable, and high-performance part suitable for a performance-oriented engine. However, it's crucial to ensure compatibility with your specific engine and vehicle, and to carefully consider whether the potential benefits justify the cost, especially if you're not planning on using this crankshaft for performance enhancements.

Before making a purchase, research the specific crankshaft model thoroughly to understand its intended application, compatibility, and potential performance benefits. Consult with a trusted mechanic or Porsche specialist to confirm the suitability of this part for your vehicle and to assess whether the investment aligns with your driving needs and goals.

Details:

Shipping within the 48 states is about $ 100. Part # 997.102.02.81D, Perfect crank to make a 4.0 liter air cooled 911. Both mains rod journals are at 1st undersized, 0.25mm. Heat treated micro polished.

Excellent Porsche 911 4.0 liter 80.4mm stroke crankshaft, redone by Marine crank never used since, heat treated, 0.25mm / 0.25 undersized on both mains rods.

part #: 9971020218d price

• $4495.00

specifications cranshafengin:

• for models: Marine, 911
• for makes: Porsche
• mpn: 9971020218d
• part type: Crankshaft Crank

seller cranshafengin:

• city: Ontario, California
• # reviews: 31199
• rating: 99.8%

shipping cranshafengin:

• transit: 5-13 Days
• cost: $100.00
• service: Standard
• type: Fixed
• class: Standard

offer cranshafengin:

• started: November 21, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

returns cranshafengin:

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

payments cranshafengin:

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

general cranshafengin:

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

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