Choosing the correct automotive replacement flexplate is crucial for your vehicle's transmission performance and overall drivetrain integrity. A well-matched flexplate ensures efficient power transfer from the engine to the transmission, preventing costly damage and maintaining smooth operation. Making an informed decision is vital for long-term reliability and safety on the road.
- Balanced to factory specs
- Fit and function like the original parts;Restores normal operation
- Fit type: Vehicle Specific
- ATP Transmission Parts
- SFI 29.1 certified
- 0.035 inch thicker than stock flexplates
- Designed and built for racing
- Manufactured to exceed OEM specifications
- Features double-welded ring gears designed to withstand the RPM and stress of engine torque related to high stall converters
- Engine Compatibility: Designed for Small Block Compatible with Chevy engines with a two-piece rear main seal, making it a suitable choice for specific engine configurations.
- Installation Flexibility: Perfect for installations of a new engine or transmission, adding versatility to your vehicle repair or upgrade project.
- Tooth Count: Comes with 168 teeth, contributing to efficient and smooth transmission operation.
- Dual Bolt Patterns: Features dual bolt patterns, 10-3/4" and 11-1/2", offering compatibility with a range of setups.
- Key Dimensions: The flexplate has an outside diameter of 14.09" and a center hole of 2-1/2", providing the required specs for precise fitment.
- 【FITMENTS】This 1845400 external balance flex plate compatible with 1970-1990 Big Block Chevrolet 454 Engine Corvette/Caprice/Suburban/Silverado & More. Ensuring perfect OEM fitment with all necessary hardware included for a hassle-free install
- 【High Quality】Flywheel built from premium chromoly steel that's stronger and more fatigue-resistant than standard flexplates. The reinforced plate design minimizes flexing and ensures smoother engagement between the torque converter and the...
- 【Stable】Every BBC 454 flex plate is dynamically balanced during manufacturing to ensure stable engagement between the engine and transmission. Whether at idle or high RPM, vibration and noise are noticeably reduced
- 【Durable】Featuring a corrosion-resistant surface treatment and reinforced ring gear welding to lower the risk of wear and failure over time
- 【36-MONTH WARRANTY】"High Quality Product And Service For You" has always been our goal, we always stand behind our products. The 1845400 flexplate and bolts kit comes with a 24-month warranty, if you have any questions, please feel free to contact us...
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
- Balanced to factory specs
- Fit type: Vehicle Specific
- ATP Z-273 Automatic Transmission Flywheel Flex-Plate
- Item Package Weight: 5.5 pounds
- Package Dimensions: 14.6 in L x 14.55 in W x 1.1 in H (inches)
- Fit Type: Vehicle Specific
- Package Weight: 6.76 lbs (pounds)
- Country of Origin : United States
- Compatible with Chevy V8
- SFI 29.1 certified
- 0.035 inch thicker than stock flexplates
- Designed and built for racing
- Manufactured to exceed OEM specifications
- Features double-welded ring gears designed to withstand the RPM and stress of engine torque related to high stall converters
- Balanced to factory specs
- Fit and function like the original parts
- Restores normal operation
- Country of origin: CN
- All applications for flexplates are SFI 29.1 Certified
- Available in Externally and Internally Balanced options
- Most flexplates feature Zinc Dichromate Plated finish for superior corrosion resistance and good looks
- Heavy Duty design utilized thicker than stock steel plate enabling to withstand the stress of high-stall converters and high-RPM engines
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Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Flexplates
Key Factors for Choosing an Automotive Replacement Flexplate
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Vehicle Compatibility and Specifications
Ensuring the flexplate is a precise match for your vehicle's make, model, year, engine, and transmission is paramount. Check for correct bolt patterns for both the crankshaft and torque converter, as well as the ring gear tooth count. An improperly sized or balanced flexplate can lead to severe vibration, premature wear, and costly damage to your engine and transmission. Always consult your vehicle's OEM specifications or a trusted parts catalog to confirm compatibility before purchase.
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Material and Durability
The material composition significantly impacts a flexplate's durability and performance. Most standard replacement flexplates are made from high-strength steel. For high-performance applications, billet steel or specialized alloys offer superior strength and resistance to deflection and cracking under extreme stress. Consider your vehicle's intended use—daily driving, towing, or racing—to determine the appropriate level of material robustness needed for optimal longevity and reliability.
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SFI Certification
For vehicles involved in competitive racing or very high-performance applications, an SFI (SFI Foundation Inc.) certification is a critical factor. SFI-certified flexplates have undergone rigorous testing to meet specific safety and performance standards, ensuring they can withstand extreme RPMs and torque without catastrophic failure. While not necessary for standard street vehicles, SFI certification provides an extra layer of assurance for demanding environments, often required by racing organizations.
