Looking for the best Chevy 400 flexplates to power your engine? Discover top-tested options offering unbeatable durability, precise fit, and smooth performance for daily driving or high-RPM racing demands.
Your Chevy 400 engine needs a flexplate that’s tough, precise, and reliable. The best flexplates here are tested for power, fit, and durability. They work flawlessly with your 168-tooth setup and external balance.
SFI-certified models and heavy-duty steel builds dominate this list. These flexplates handle high RPMs, racing stress, and daily driving with ease.
Dual bolt patterns and thick chromoly steel ensure a secure, vibration-free connection. Whether you’re rebuilding or upgrading, these picks deliver smooth power transfer and long life.
List of Top 10 Chevy 400 Flexplates
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Speedmaster PCE226.1003 Compatible with Chevy SBC 383 400 2Pc Rms 168 Tooth 11″ External Balance Heavy Duty Flexplate |
Perfect for Chevy SBC 383 or 400 engine builders needing a durable, track-proven flexplate. This Speedmaster 226 Flexplate offers heavy-duty performance, 168-tooth precision, and a 12-month warranty for reliability in high-stress builds. |
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Speedway Motors Flexplate 168 Tooth Compatible with Chevy Small Block 400 Engine Two Piece Rear Main Seal External Balance Dual Bolt Pattern Non SFI |
This flexplate is perfect for Chevy small block 400 engine owners who need a reliable replacement for their street-driven vehicles. It’s ideal for those installing a new engine or transmission and want smooth starter engagement with dual bolt pattern options. |
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Allstar Performance ALL26810 168T 400 SFI External Balance Flexplate |
This flexplate is perfect for racers who need a strong and reliable part. It fits SB Chevy 400 engines and meets SFI safety specs. The thicker design and dual bolt patterns make it ideal for high-performance use. |
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Allstar Performance Flexplate, 168 Tooth, SFI 29.1, Steel, Internal Balance, 2-Piece Seal, compatible with Chevy V8, Each |
This flexplate is perfect for Chevy V8 owners and mechanics needing a durable, reliable part. It works with internal balance engines and meets SFI 29.1 safety standards. The steel build and 2-piece seal design ensure long-lasting performance. |
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PRW 1840000 SFI-Rated External Balance 168 Teeth Chromoly Steel Flexplate for Chevy 400/383 1970-80 Early |
This SFI 29.1 certified flexplate is ideal for racers and high-performance Chevy engine builders. Its double-welded ring gears and 0.035 inch thicker design tackle extreme torque from high stall converters, ensuring durability in tough racing conditions. |
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JEGS Heavy-Duty SFI 29.1 Flexplate | Compatible With Chevy Small Block 400 Engines 1970-1980 | 168-Tooth | Externally Balanced | Dual Converter Bolt Pattern | For 2-Piece Rear Main Seal |
This JEGS Heavy-Duty Flexplate is perfect for car enthusiasts who want a strong and reliable part for their 1970-1980 Chevy Small Block 400 engine. It’s great for racing and fits both 10.75″ and 11.5″ torque converters. |
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Allstar Performance ALL26815 168T 400 Standard External Balance Flexplate |
This flexplate is perfect for SB Chevy 400 engines. It’s ideal for those needing a 168-tooth, 14-1/8” diameter fit. |
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PRW 1835001 SFI-Rated Internal Balance 168 Teeth Chromoly Steel Flexplate for Chevy 1957-85, 90 Early, V6, Gold Irridate |
This flexplate is perfect for racers and high-performance Chevy engine builders. It’s SFI 29.1 certified, thicker than stock, and built with double-welded ring gears to handle extreme torque and RPM. |
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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 with a 383 or 400 engine. It’s ideal for those needing a reliable replacement with 168-tooth ring gear and external balance. |
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ALUMINUM FLEXPLATE FLYWHEEL COVER Compatible/Replacement for CHEVY GM TURBO 350-400 – BLACK |
This product is perfect for Chevy or GM vehicle owners needing a reliable replacement for Turbo 350 or 400 transmissions. Its durable aluminum construction and black finish offer long-lasting performance and a sleek look. |
Detailed Reviews
Looking for the best Chevy 400 flexplates? Our guide reviews top picks built to last, tested for racing, street, and daily use. Each heavy-duty flexplate offers SFI-certified strength, 168-tooth precision, and compatibility with classic Chevy engines. Trust our expert picks to boost performance and ensure reliable power transfer—explore now to find your perfect match!
1. Speedmaster PCE226.1003 Compatible with Chevy SBC 383 400 2Pc Rms 168 Tooth 11″ External Balance Heavy Duty Flexplate
The Speedmaster PCE226.1003 is a heavy-duty flexplate designed for Chevy SBC 383 400 engines. It features a 2-piece RMS design with 168 teeth and an 11-inch external balance.
This Track Proven product is built to last, tested on road, race, and recreation. It comes with a 12-month limited warranty and reflects Speedmaster’s blend of old and new technology.
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Perfect For:
Perfect for Chevy SBC 383 or 400 engine builders needing a durable, track-proven flexplate. This Speedmaster 226 Flexplate offers heavy-duty performance, 168-tooth precision, and a 12-month warranty for reliability in high-stress builds.
Ready to Purchase?
2. Speedway Motors Flexplate 168 Tooth Compatible with Chevy Small Block 400 Engine Two Piece Rear Main Seal External Balance Dual Bolt Pattern Non SFI
The Speedway Motors Flexplate is designed for Chevy small block 400 engines. It works with two-piece rear main seals only. This flexplate has a 168-tooth ring gear for smooth starter operation.
It features dual bolt patterns for easy transmission compatibility. Built for street-driven use, it’s non-SFI rated and recommended for new engine or transmission installs.
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Perfect For:
This flexplate is perfect for Chevy small block 400 engine owners who need a reliable replacement for their street-driven vehicles. It’s ideal for those installing a new engine or transmission and want smooth starter engagement with dual bolt pattern options.
Ready to Purchase?
3. Allstar Performance ALL26810 168T 400 SFI External Balance Flexplate
Allstar Performance ALL26810 fits SB Chevy 400 engines with a 168-Tooth design. It meets SFI-Approved 29.1 specs for safety and strength. The plate is .035″ Thicker Than Stock for added durability.
Gold Iridite Plating resists rust and wear. Dual Converter Bolt Patterns offer flexibility for different setups.
This flexplate boosts engine reliability. It handles high-stress conditions with ease. A solid choice for performance builds.
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Perfect For:
This flexplate is perfect for racers who need a strong and reliable part. It fits SB Chevy 400 engines and meets SFI safety specs. The thicker design and dual bolt patterns make it ideal for high-performance use.
Ready to Purchase?
4. Allstar Performance Flexplate, 168 Tooth, SFI 29.1, Steel, Internal Balance, 2-Piece Seal, compatible with Chevy V8, Each
The Allstar Performance Flexplate works with Chevy V8 engines. It has 168 teeth and meets SFI 29.1 safety standards for reliability.
Steel construction ensures strength. Internal balance design improves engine smoothness. The 2-piece seal setup aids leak-free performance.
This flexplate fits specific vehicles. It ships in a 35.3 x 37.6 x 2.8 cm box weighing 6.8 pounds. Made in the United States for quality.
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Perfect For:
This flexplate is perfect for Chevy V8 owners and mechanics needing a durable, reliable part. It works with internal balance engines and meets SFI 29.1 safety standards. The steel build and 2-piece seal design ensure long-lasting performance.
Ready to Purchase?
5. PRW 1840000 SFI-Rated External Balance 168 Teeth Chromoly Steel Flexplate for Chevy 400/383 1970-80 Early
The PRW 1840000 Flexplate is a high-performance upgrade for your Chevy engine. It’s SFI 29.1 certified, ensuring safety and reliability. This flexplate is built tough for racing demands.
It’s 0.035 inches thicker than stock flexplates, offering extra strength. The double-welded ring gears handle high RPM and torque easily. Designed to exceed OEM specs, it’s a durable choice.
Perfect for Chevy 400/383 engines from 1970-80, this flexplate is race-ready. It’s engineered to perform under extreme conditions.
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Perfect For:
This SFI 29.1 certified flexplate is ideal for racers and high-performance Chevy engine builders. Its double-welded ring gears and 0.035 inch thicker design tackle extreme torque from high stall converters, ensuring durability in tough racing conditions.
Ready to Purchase?
6. JEGS Heavy-Duty SFI 29.1 Flexplate | Compatible With Chevy Small Block 400 Engines 1970-1980 | 168-Tooth | Externally Balanced | Dual Converter Bolt Pattern | For 2-Piece Rear Main Seal
This flexplate fits 1970-1980 Chevy 400 small block engines with a 2-piece rear main seal. It meets the SFI 29.1 rating, approved for most racing rules.
The dual torque converter bolt pattern works with both 10.75” and 11.5” converters. Built from chromoly steel, it stays strong and lasts long under stress.
It’s externally balanced for smooth performance. The 168-tooth design ensures reliable engagement. Every feature is built for power and durability.
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Perfect For:
This JEGS Heavy-Duty Flexplate is perfect for car enthusiasts who want a strong and reliable part for their 1970-1980 Chevy Small Block 400 engine. It’s great for racing and fits both 10.75″ and 11.5″ torque converters.
Ready to Purchase?
7. Allstar Performance ALL26815 168T 400 Standard External Balance Flexplate
The Allstar Performance ALL26815 flexplate fits small block Chevy 400 engines. It has a 168-tooth design for strong gear engagement. The 14-1/8” diameter ensures proper fit and function.
This flexplate uses an external balance setup. It works with standard Chevy 400 engine configurations.
Built to last, it connects the engine and transmission smoothly. The high-quality materials handle tough conditions. Drivers get reliable performance and smooth power transfer.
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Perfect For:
This flexplate is perfect for SB Chevy 400 engines. It’s ideal for those needing a 168-tooth, 14-1/8” diameter fit.
Ready to Purchase?
8. PRW 1835001 SFI-Rated Internal Balance 168 Teeth Chromoly Steel Flexplate for Chevy 1957-85, 90 Early, V6, Gold Irridate
This PRW 1835001 flexplate is SFI 29.1 certified for safety and performance. It’s 0.035 inch thicker than stock to handle extra stress.
Designed for racing, it exceeds OEM specs and uses chromoly steel for toughness. Double-welded ring gears resist damage from high RPM and torque.
Double-welded gears last longer. Perfect for high stall converters. Fits Chevy 1957–85, 90 early V6 models.
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Perfect For:
This flexplate is perfect for racers and high-performance Chevy engine builders. It’s SFI 29.1 certified, thicker than stock, and built with double-welded ring gears to handle extreme torque and RPM.
Ready to Purchase?
9. Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts)
This Automatic Transmission 168-tooth Flexplate fits Chevy 383 and 400 engines. It has a 168-tooth ring gear for smooth gear engagement. The design works with external balanced engines for proper performance.
The 2-piece rear main seal style ensures a secure fit. HP bolts add strength to handle high-power setups. It replaces OEM part 343738 without extra modifications.
This flexplate is built to last and works right out of the box. It’s a direct replacement for older Chevy V8 engines.
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Perfect For:
This Automatic Transmission Flexplate is perfect for Chevy owners with a 383 or 400 engine. It’s ideal for those needing a reliable replacement with 168-tooth ring gear and external balance.
Ready to Purchase?
10. ALUMINUM FLEXPLATE FLYWHEEL COVER Compatible/Replacement for CHEVY GM TURBO 350-400 – BLACK
This ALUMINUM FLEXPLATE FLYWHEEL COVER is made by CFR Performance. It fits CHEVY GM TURBO 350-400 engines. The black finish adds style and durability.
The cover is lightweight at just 2 pounds. It installs easily with standard tools.
Measuring 4 inches in all directions, it’s compact and sturdy. The part number HZ-8607-PBK ensures accurate ordering. CFR Performance designs it for reliable engine protection.
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Perfect For:
This product is perfect for Chevy or GM vehicle owners needing a reliable replacement for Turbo 350 or 400 transmissions. Its durable aluminum construction and black finish offer long-lasting performance and a sleek look.
Ready to Purchase?
Buying Guide
Chevy 400 flexplates connect your engine to the transmission. They handle power, reduce vibration, and ensure smooth operation. Choosing the right one boosts performance and reliability.
Factors to Consider When Buying a Chevy 400 Flexplate:
- Tooth Count: Always match the 168-tooth design to your engine’s setup for proper fit.
- Balance Type: Choose external balance for most Chevy 400 engines, unless your setup requires internal balance.
- Material: Chromoly steel or heavy-duty steel offers strength and durability for high-stress use.
- SFI Certification: SFI-rated flexplates meet safety standards for racing or high-performance applications.
- Bolt Pattern: Ensure the flexplate has the right bolt pattern for your transmission and converter.
- Seal Type: Match the flexplate to your engine’s rear main seal (1-piece or 2-piece).
- Thickness: Thicker flexplates (like 0.035 inches) add strength for racing or heavy loads.
- Warranty: Look for products with a warranty for peace of mind and reliability.