GM 12621399 Ls Flexplate Engines Crank 6-BOLT

( Brand: Gm ), ( Manufacturer Part Number: 12621399 ), ( Number Of Teeth: 168 ), ( Type: Flexplate ), ( Flywheel Type: Solid ), ( Material: Steel ), ( Vintage Part: No ), ( Country/region Of Manufacture: United States ), ( Transmission Type: Automatic )

Review GM Oem Ls Flexplate Engines 6-bolt Crank

Introducing the 12621399 LS Flexplate by GM, an essential component for engines equipped with a 6-bolt crankshaft. The LS Flexplate is meticulously engineered to provide optimal power transmission from the engine to the transmission.

This particular flexplate is specifically designed for use with General Motors LS-series engines. It features a robust, cast-iron construction that ensures durability and reliability, even under heavy load. Its 6-bolt design provides a secure connection to the crankshaft and engine, providing a strong foundation for the powertrain.

The LS Flexplate boasts a unique, smooth surface finish that ensures a positive engagement with the clutch disc. This results in smooth, efficient power transfer and improved overall performance. The surface finish is also engineered to reduce friction, which helps to minimize heat generation and extend the lifespan of the clutch system.

Moreover, the LS Flexplate comes with a precision-machined flywheel boss that ensures alignment with the crankshaft and transmission input shaft. This ensures that the powertrain components are properly aligned, reducing the risk of wear and tear and improving the overall performance and longevity of the engine and transmission.

The LS Flexplate is also designed to accommodate a variety of clutch systems, making it a versatile option for a range of applications. It is also compatible with both manual and automatic transmission setups, making it a valuable addition to any LS-powered vehicle.

In summary, the 12621399 LS Flexplate by GM is a high-quality, durable component that is essential for the proper functioning of LS-series engines with a 6-bolt crankshaft. Its robust construction, smooth surface finish, and precision-machined flywheel boss ensure efficient power transfer, reduced friction, and improved overall performance. Whether you're building a high-performance race engine or simply maintaining your daily driver, the LS Flexplate is an indispensable addition to your engine rebuild or upgrade project.

Pros and Cons of Buying a GM 12621399 LS Flexplate for Engines with 6-Bolt Crank

The GM 12621399 LS Flexplate is a crucial component in the powertrain of certain GM engines with a 6-bolt crankshaft. Replacing a worn-out or damaged flexplate can help prevent catastrophic engine damage. In this article, we will discuss the pros and cons of purchasing this specific flexplate to help you make an informed decision.

1. OEM Quality: The GM 12621399 LS Flexplate is a genuine original equipment manufacturer (OEM) part. This means it is designed, engineered, and manufactured by General Motors to meet the exact specifications of your engine.

2. Durability: As an OEM part, the GM flexplate is built to last. It is made from high-quality materials and engineered to withstand the rigors of daily driving.

3. Compatibility: The GM 12621399 LS Flexplate is specifically designed for engines with a 6-bolt crankshaft. This ensures a perfect fit and proper function.

4. Peace of Mind: Installing an OEM GM flexplate in your engine provides peace of mind. You can be confident that the part is designed to work with your engine and that it will last.

1. Cost: The GM 12621399 LS Flexplate is a premium part, and its price reflects its high quality. Compared to aftermarket alternatives, it may be more expensive.

2. Availability: Depending on your location and the availability of GM parts, it may take some time to source and receive the GM 12621399 LS Flexplate.

3. Installation: Installing the GM flexplate may require specialized tools and knowledge. If you are not confident in your ability to perform the installation, it may be best to leave it to a professional mechanic.

The GM 12621399 LS Flexplate is a high-quality OEM part that offers durability, compatibility, and peace of mind. However, it comes with a higher cost and potential availability issues. Ultimately, the decision to purchase the GM flexplate depends on your priorities, budget, and availability of alternative options. If you value the assurance of an OEM part and are willing to pay a premium, the GM 12621399 LS Flexplate is an excellent choice. However, if you are on a tight budget or require a more immediate solution, aftermarket alternatives may be worth considering.

If you are confident in your mechanical abilities and have the necessary tools, purchasing the GM 12621399 LS Flexplate directly from a GM dealership or authorized parts supplier is recommended. This ensures you are getting an authentic OEM part and can take advantage of any available warranties or return policies. If you are unsure about your mechanical abilities or require a more immediate solution, consider consulting a professional mechanic or exploring aftermarket alternatives. Ultimately, the choice is yours, and we hope this information helps you make an informed decision.

Details:

Fits most 4.8, 5.3, 6.0, and 6.2 LS engines, Works with automatic transmissions TH350, 4L60E, 4L80E, etc. 168-tooth ring gear, Great for swap projects or factory replacement OEM GM flexplate engines a 6-bolt crank. Ready to install. Came off a running engine no cracks, damaged teeth, and not warped.

part #: 12621399 prices

• $19.99-$64.95

specifications flwheflepla:

• brand: Gm
• mpn: 12621399
• number of teeth: 168
• type: Flexplate
• flywheel type: Solid
• material: Steel
• vintage part: No
• country/region of manufacture: United States
• transmission type: Automatic

payments flwheflepla:

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

shipping flwheflepla:

• class: Standard
• type: Calculated
• transit: 4-10 Days
• carrier: USPS
• service: USPS Ground Advantage
• cost: $9.67

seller flwheflepla:

• city: Aubrey, Texas
• # reviews: 12
• rating: 100.0%

general flwheflepla:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Flywheels Flexplates

returns flwheflepla:

• policy: No Returns

offer flwheflepla:

• started: July 15, 2025
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home

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