KING ENGINE BEARINGS Crankshaft 611500450488 MB621SI0.25 415

( Brand: King Engine Bearings ), ( Type: Crankshaft Main Bearing ), ( Oe/oem Part Number: Mb621si0.25 ), ( Items Included: Engine Bearing ), ( Universal Fitment: No ), ( Size: .25 ), ( Fitment Type: Performance/custom ), ( Notes: Compatible With Ford 415 ), ( UPC: 611500450488 ), ( Manufacturer Part Number: 621SI0.25 )

Review KING ENGINE BEARINGS .25 Crankshaft Main Ford 415

Introducing the King Engine Bearings 621SI0.25 MB621SI0.25 25 Crankshaft Bearing Set, specifically designed for Ford 4.6L MODULAR engines. These bearings are an essential upgrade for high-performance applications, delivering superior durability and reliability compared to OEM bearings.

The MB621SI0.25 25 Crankshaft Bearing Set includes six (6) individual bearings: three (3) crankshaft main bearings and three (3) crankshaft rod bearings. Each bearing is meticulously crafted using King's proprietary micro-alloy steel, ensuring exceptional strength and longevity.

The crankshaft main bearings (part numbers 621SI0.25) are oversized to reduce friction and provide better clearance for high-horsepower setups. The included snap rings are made from high-tensile steel, ensuring a secure fit and preventing premature bearing failure. The large, open-deck design of these bearings allows for increased oil flow, ensuring optimal lubrication and cooling.

The crankshaft rod bearings (part numbers MB621SI0.25) are designed to fit perfectly in their respective locations on the crankshaft. Like their larger counterparts, these bearings are also made from King's advanced micro-alloy steel, ensuring exceptional strength and durability. The included snap rings are also made from high-tensile steel for added security.

The 25-series designation on these bearings indicates that they have a 0.025-inch (0.64mm) greater outside diameter compared to their OEM counterparts. This increased diameter provides better clearance for high-performance applications and reduces the likelihood of bearing contact with piston rings, which can lead to premature wear.

Installing these bearings is a straightforward process, but it's important to follow the recommended installation procedures carefully to ensure proper seating and alignment. Properly installed, these bearings will provide excellent performance and reliability, making them an essential upgrade for any high-performance Ford 4.6L MODULAR engine.

In summary, the King Engine Bearings 621SI0.25 MB621SI0.25 25 Crankshaft Bearing Set is a high-quality upgrade for Ford 4.6L MODULAR engines seeking improved durability, reliability, and performance. With their advanced materials, oversized design, and improved clearance, these bearings are an essential component for any serious performance application.

Pros and Cons of Buying King Engine Bearings MB621SI0.25 for Ford 4.6L 415 CID Crankshaft

The King Engine Bearings MB621SI0.25 are aftermarket bearings designed for use in Ford 4.6L 415 CID crankshafts. These bearing sets are known for their high-performance capabilities, but like any aftermarket part, they come with their own set of advantages and disadvantages. In this article, we will discuss the pros and cons of buying these bearing sets to help you make an informed decision.

1. Enhanced Performance: King Engine Bearings are designed with a higher load capacity than OEM bearings, allowing for increased power output and improved performance.

2. Durability: These bearings are made from high-quality materials, including steel roller bearings and bronze bushings, which provide excellent durability and resistance to wear and tear.

3. Reduced Engine Noise: The King Engine Bearings are known to reduce engine noise, which can lead to a quieter and more enjoyable driving experience.

4. Improved Engine Longevity: By reducing friction and heat within the engine, these bearings can help improve the overall longevity of the engine.

1. Cost: King Engine Bearings are more expensive than OEM bearings, which may be a deterrent for some buyers.

2. Installation: The installation process for these bearings can be more complex than OEM bearings due to their design and materials.

3. Compatibility: While these bearings are designed for use in Ford 4.6L 415 CID crankshafts, it is crucial to ensure that they are the correct fit for your specific engine application.

In conclusion, the King Engine Bearings MB621SI0.25 offer several advantages, including enhanced performance, durability, reduced engine noise, and improved engine longevity. However, they also come with some disadvantages, such as a higher cost, more complex installation process, and potential compatibility issues. Ultimately, the decision to purchase these bearing sets depends on your specific needs, budget, and engine application.

If you are looking for high-performance bearings and are willing to invest in the cost and installation process, then the King Engine Bearings MB621SI0.25 may be the right choice for you. However, if you are on a tight budget or prefer a more straightforward installation process, OEM bearings may be a more suitable option. It is always recommended to consult with a professional mechanic or engine builder to ensure that you are making the best decision for your specific engine application.

Details:

For listings with free shipping, it only applies within the continental 48 states. Regardless if its race, track, or stock replacements they have proven get the job done. Compatible with: FORD 415Number of pairs in a set: 6Bearing size: .25King Bearings have been proven time and again to be the best on market.

part #: 621si025 prices

• $53.20-$66.59

specifications engibearing:

• for makes: Ford
• brand: King Engine Bearings
• type: Crankshaft Main Bearing
• oe/oem part number: Mb621si0.25
• items included: Engine Bearing
• universal fitment: No
• size: .25
• fitment type: Performance/custom
• notes: Compatible With Ford 415
• upc: 611500450488
• manufacturer part number: 621SI0.25

shipping engibearing:

• service: Standard
• class: Standard
• transit: 3-6 Days
• type: Fixed
• cost: $0.00

offer engibearing:

• started: September 7, 2025
• sold: 0
• availability: In Stock
• options: Ship-to-home

general engibearing:

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

payments engibearing:

• other
• wallet: Paypal
• credit card: Diners-club

seller engibearing:

• rating: 98.5%
• city: Wrightstown, Wisconsin
• # reviews: 66171

returns engibearing:

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

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