Looking for the best external balanced flexplates to enhance your engine’s performance? We’ve curated a list of top 10 options, offering a seamless and engaging experience to help you find the perfect match for your Chevy engine, ensuring smooth operation and long-term reliability.
External balance flexplates are vital for smooth engine performance and long-term reliability. They ensure proper rotating assembly balance and starter engagement in high-demand setups. Choosing the right one can boost power transfer and reduce engine stress.
Our top picks cover Chevy 350, 454, 383, and 400 engines, with SFI-certified options and durable steel designs. Each flexplate is built for precise fit and vibration-free operation.
From racing applications to daily drivers, these flexplates deliver proven strength and easy installation. Trust our guide to find your perfect match and upgrade your engine’s performance today.
List of Top 10 External Balanced Flexplates
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Speedway Motors 153 Tooth Flexplate External Balance Compatible with 1986–1997 Chevy Small Block 4.3 305 350 Engines 1 Piece Rear Main Seal Steel Design |
This flexplate is perfect for car enthusiasts and mechanics working on 1986–1997 Chevy engines. It’s ideal for a smooth and reliable installation. |
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HQPASFY 1845400 Flexplate, External Balance 168 Teeth and Bolts Kit, Chromoly Steel, Compatible with 1970-1990 Big Block Chevy 454 Engine Corvette/Caprice/Suburban/Silverado &More |
This HQPASFY 1845400 Flexplate is perfect for car enthusiasts and mechanics who need a reliable and durable replacement for their 1970-1990 Big Block Chevy 454 engine. It’s ideal for those seeking a smooth and stable ride with reduced noise and vibration. |
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Speedway Motors SBC 168 Tooth Flex plate SFI 29.1 Certified, 1 Piece Rear Main Seal, External Balance Steel Flex Plate for Automatic Transmission Applications |
This flex plate is perfect for Chevy small block engine builders needing a 1-piece rear main seal setup with automatic transmission. It’s built for external balance, SFI 29.1 certification, and steel durability, making it ideal for high-performance street or race use. |
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Allstar Performance ALL26825 168T 454 Standard External Balance Flexplate |
The Allstar Performance ALL26825 Flexplate is perfect for car enthusiasts working on a BB Chevy 454 engine. It’s externally balanced and 14-1/8” in diameter, making it a great fit for standard setups. |
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Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts) |
This Automatic Transmission Flexplate is perfect for Chevy owners who need a reliable replacement for their 383 or 400 engines. It’s easy to install and works great for external balanced setups. |
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Speedway Motors SFI Approved SBF 157 Tooth Flex plate for 289, 302, 351W, 50oz External Balance, High Strength Steel, Lightweight Design, Windsor Engines |
This flexplate is perfect for racers and performance enthusiasts who want reliable, high-strength parts for their Small Block Ford engines. It’s ideal for 289, 302, and 351W engines, offering lightweight design and durable construction for better performance. |
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Engine Works SFI-Approved Flexplates 400168 |
Engine Works SFI-Approved Flexplates 400168 are perfect for Chevy 383/400 engine owners who need a reliable, SFI 29.1-approved flexplate. It’s ideal for high-performance builds with its 168-tooth design and external engine balance. |
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Engine Works SFI-Approved Flexplates 454168E |
Engine Works SFI-Approved Flexplates 454168E are perfect for car enthusiasts and mechanics who need reliable parts. They work great for high-performance engines with their 168-tooth design and external balance. |
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External Balance Flexplate Bolt Kit,7/16 Inch – 20 Thread Size |
This External Balance Flexplate Bolt Kit is perfect for car enthusiasts and mechanics working on 90-degree V6 or 502 V8 engines. It’s ideal for upgrades needing stronger bolts and better flywheel fit. |
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Allstar ALL26801 Flexplate 168T SFI External Balance 86-up |
This flexplate is perfect for vehicle owners with V8 engines needing a durable replacement. It’s SFI-certified, balanced, and fits 1986-up models for strong performance. |
Detailed Reviews
Discover the top 10 External Balanced Flexplates in our expert-curated guide. Each product is thoroughly reviewed for performance, durability, and value, ensuring you find the perfect fit for your engine. Whether you prioritize smooth operation or affordability, this guide has you covered—read on to make an informed choice.
1. Speedway Motors 153 Tooth Flexplate External Balance Compatible with 1986–1997 Chevy Small Block 4.3 305 350 Engines 1 Piece Rear Main Seal Steel Design
Speedway Motors 153 Tooth Flexplate is perfect for 1986–1997 Chevy engines. It fits 4.3L, 305, and 350 models with a 1-piece rear main seal. This flexplate ensures smooth and reliable performance.
It features a 153-tooth ring gear for proper starter engagement. The 3 on 10-3/4 inch bolt pattern ensures a secure and correct fit.
Made from durable steel, it’s built to last. Its external balance design works perfectly with 1986–1997 V8 engines, ensuring proper rotating assembly balance.
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Perfect For:
This flexplate is perfect for car enthusiasts and mechanics working on 1986–1997 Chevy engines. It’s ideal for a smooth and reliable installation.
Ready to Purchase?
2. HQPASFY 1845400 Flexplate, External Balance 168 Teeth and Bolts Kit, Chromoly Steel, Compatible with 1970-1990 Big Block Chevy 454 Engine Corvette/Caprice/Suburban/Silverado &More
The HQPASFY 1845400 Flexplate fits 1970-1990 Big Block Chevy 454 engines. It’s made of strong chromoly steel for better performance. All hardware is included for easy installation.
This flexplate reduces vibration and noise for smoother driving. It’s durable and comes with a 36-month warranty for peace of mind.
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Perfect For:
This HQPASFY 1845400 Flexplate is perfect for car enthusiasts and mechanics who need a reliable and durable replacement for their 1970-1990 Big Block Chevy 454 engine. It’s ideal for those seeking a smooth and stable ride with reduced noise and vibration.
Ready to Purchase?
3. Speedway Motors SBC 168 Tooth Flex plate SFI 29.1 Certified, 1 Piece Rear Main Seal, External Balance Steel Flex Plate for Automatic Transmission Applications
The Speedway Motors SBC 168 Tooth Flex Plate is a durable and reliable choice for your engine. It’s designed for Small Block Chevy engines with a 1-piece rear main seal and automatic transmission.
This flex plate has a 168-tooth ring gear for proper starter engagement. It fits externally balanced engines and meets SFI 29.1 safety standards. Made of steel, it’s built to last in demanding applications.
Perfect for street or race use, it ensures smooth performance. Its 14.13-inch diameter matches transmission components. Trust this flex plate for dependable service life.
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Perfect For:
This flex plate is perfect for Chevy small block engine builders needing a 1-piece rear main seal setup with automatic transmission. It’s built for external balance, SFI 29.1 certification, and steel durability, making it ideal for high-performance street or race use.
Ready to Purchase?
4. Allstar Performance ALL26825 168T 454 Standard External Balance Flexplate
The Allstar Performance ALL26825 is a 168-tooth flexplate designed for BB Chevy 454 engines. It features an externally balanced design for smooth operation.
This flexplate measures 14-1/8” in diameter, ensuring a perfect fit for your engine. It’s durable and reliable, built to handle high performance.
| Pros | Cons |
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Perfect For:
The Allstar Performance ALL26825 Flexplate is perfect for car enthusiasts working on a BB Chevy 454 engine. It’s externally balanced and 14-1/8” in diameter, making it a great fit for standard setups.
Ready to Purchase?
5. Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts)
This Automatic Transmission Flexplate fits Chevy 383 and 400 engines with a 168-tooth ring gear. It’s built for external balance setups and includes high-performance bolts for durability.
The design matches 2-piece rear main seal systems and replaces OEM part 343738. It’s a strong, reliable upgrade for engines needing sturdy drivetrain parts.
HP bolts add strength. Non-SFI for standard use. 168-tooth ensures smooth gear engagement.
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Perfect For:
This Automatic Transmission Flexplate is perfect for Chevy owners who need a reliable replacement for their 383 or 400 engines. It’s easy to install and works great for external balanced setups.
Ready to Purchase?
6. Speedway Motors SFI Approved SBF 157 Tooth Flex plate for 289, 302, 351W, 50oz External Balance, High Strength Steel, Lightweight Design, Windsor Engines
Speedway Motors Flex Plate is SFI-approved and built for racing. It fits 289, 302, and 351W Windsor engines.
High-strength steel makes it durable. Lightweight design boosts engine response. Double-welded ring gear handles high loads.
| Pros | Cons |
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Perfect For:
This flexplate is perfect for racers and performance enthusiasts who want reliable, high-strength parts for their Small Block Ford engines. It’s ideal for 289, 302, and 351W engines, offering lightweight design and durable construction for better performance.
Ready to Purchase?
7. Engine Works SFI-Approved Flexplates 400168
Engine Works SFI-Approved Flexplates 400168 are built tough for Chevy 383/400 engines. They feature a 168-tooth design and external engine balance. These flexplates are SFI 29.1 certified, ensuring safety and performance.
They work with 2-piece rear main seals and come one per purchase. Perfect for reliable engine operation.
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Perfect For:
Engine Works SFI-Approved Flexplates 400168 are perfect for Chevy 383/400 engine owners who need a reliable, SFI 29.1-approved flexplate. It’s ideal for high-performance builds with its 168-tooth design and external engine balance.
Ready to Purchase?
8. Engine Works SFI-Approved Flexplates 454168E
Engine Works SFI-Approved Flexplates 454168E are built tough. They have a 168-tooth design for smooth power transfer. These flexplates are reliable and durable.
The external balance feature ensures your engine runs smoothly. It reduces vibrations for better performance.
With a 2-piece rear main seal, these flexplates are leak-resistant. They are designed to last long and perform well.
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Perfect For:
Engine Works SFI-Approved Flexplates 454168E are perfect for car enthusiasts and mechanics who need reliable parts. They work great for high-performance engines with their 168-tooth design and external balance.
Ready to Purchase?
9. External Balance Flexplate Bolt Kit,7/16 Inch – 20 Thread Size
The External Balance Flexplate Bolt Kit is a must-have for your engine. It works with 90-degree V6 and 502 V8 engines. This kit ensures a secure and reliable connection.
It has a 7/16 inch – 20 thread size and a 0.725 inch under-head length. The bolts are forged from aerospace alloy and heat-treated for maximum strength. They can handle 200,000 PSI tensile strength.
This kit features a unique 12-point head design and a larger shank diameter. It includes a flanged nut for easy installation. The result is increased strength and improved flywheel register for your engine.
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Perfect For:
This External Balance Flexplate Bolt Kit is perfect for car enthusiasts and mechanics working on 90-degree V6 or 502 V8 engines. It’s ideal for upgrades needing stronger bolts and better flywheel fit.
Ready to Purchase?
10. Allstar ALL26801 Flexplate 168T SFI External Balance 86-up
Allstar ALL26801 Flexplate is an auto part built for strength. It has 168 teeth and meets SFI standards for safety. This external balance design fits models from 1986 onward.
The United States-made part weighs 5.16 lbs. Its package measures 35.8 cm L x 36.8 cm W x 3 cm H.
This flexplate ensures smooth engine performance. Trust Allstar for durable, reliable automotive upgrades.
| Pros | Cons |
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Perfect For:
This flexplate is perfect for vehicle owners with V8 engines needing a durable replacement. It’s SFI-certified, balanced, and fits 1986-up models for strong performance.
Ready to Purchase?
Buying Guide
External balance flexplates keep your engine smooth and strong. They match your engine’s balance needs and reduce stress. Pick the right one for power, quiet runs, and fewer breakdowns.
- Engine Compatibility: Match flexplates to your Chevy engine type (350, 454, 383, 400) and model years. Check if it fits 1-piece or 2-piece rear main seals for leak-free use.
- Material Quality: Steel or chromoly steel flexplates last longer under stress. High-strength steel resists wear in racing or heavy-duty setups.
- Tooth Count and Ring Gear: 153 or 168 teeth ensure starter gears mesh right. Double-welded ring gears handle high torque without slipping.
- SFI Certification: SFI 29.1-rated flexplates meet safety standards for racing or high-performance use. Non-SFI options work for daily drivers.
- Rear Main Seal Fit: Confirm if your engine uses 1-piece or 2-piece seals. Wrong fits cause oil leaks and misalignment.
- Bolt Pattern and Hardware: Use 7/16-inch bolts with aerospace-grade strength for secure mounting. Kits with flanged nuts simplify tight installs.
- External Balance Design: Required for engines with offset counterweights. Ensures smooth idle and reduces crankshaft stress.
- Application Type: Street-driven cars need vibration-free daily use. Racing builds demand lightweight, durable designs.
- Vibration and Noise Control: Precision-balanced flexplates cut engine hum. Chromoly steel and proper tooth counts keep rides quiet.
- Durability and Warranty: Look for 36-month warranties or SFI-certified builds. Steel flexplates outlast cast iron in tough conditions.
- Installation Ease: Pre-drilled bolt holes and included hardware speed up swaps. Lightweight designs ease handling during installs.
- Size and Fitment: Measure diameter (e.g., 14.13 inches) to match transmission parts. Wrong sizes strain drivetrain components.