Looking for the best SFI Certified flexplates? We offer a hand‑picked range of high‑strength, SFI Certified flexplates that deliver reliable, high‑torque performance for any vehicle.
Looking for reliable flexplates? SFI Certified options are the gold standard for strength and safety. These parts handle high-torque demands without breaking.
Each flexplate is built for specific engines, from Chevy to Dodge Cummins. They feature thicker steel, zinc-plated finishes, and secure ring gears. Perfect for racing, towing, or daily use.
Drivers trust SFI Certified flexplates for long-lasting performance. Upgrade your build with proven durability and peace of mind.
List of Top 10 SFI Certified Best Plates
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Hays 10-010 Steel SFI Certified Flexplate |
The Hays 10-010 Steel SFI Certified Flexplate is perfect for car enthusiasts and professional mechanics who need a reliable, heavy-duty flexplate. It’s ideal for high-performance engines like the 396, 402, and 427. |
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Speedway Motors SFI Certified 168 Tooth Flexplate Internal Balance for 1965–85 Applications, Two-Piece Rear Main Seal Engines, Steel Construction compatible with Chevy Motors |
It is great for owners of classic 1965‑85 Chevrolet cars with two‑piece rear main seal engines. The SFI Certified, 168‑tooth, internally balanced flexplate fits easily and works with a balance plate for 383 or 400 engines. |
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Street Sport Industries SFI Flexplate For Dodge Cummins – Fits 5.9L 12V & 24V Engines With 47RE / 47RH / 48RE Transmissions – Heavy Duty SFI-Approved Flex Plate Fits With Ram 2500/3500 |
This flexplate is perfect for Dodge Ram 2500 and 3500 owners running the 5.9L Cummins diesel—especially those towing heavy loads, pushing more power, or replacing a worn-out stock unit. Truck builders and diesel mechanics trust it for high-torque builds because it’s SFI-approved and built to handle extra stress without fail. If you want stronger starts, smoother power transfer, and a part that lasts under tough conditions, this is your direct-fit upgrade. No guesswork. No modifications. Just reliable performance every time you turn the key. |
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Hays 12-071 Steel SFI Certified Flexplate |
Are you building a serious race car? Do you need a flexplate that can take a beating? The Hays 12-071 is perfect for high-performance engines with 8-bolt crankshafts. It’s built tough to handle anything you throw at it! |
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Street Sport Industries SFI Flexplate For Dodge Cummins – Fits 6.7L 24V Engines (2007.5–2012) – Heavy Duty SFI-Approved Flex Plate Fits With Ram 2500/3500 |
This flexplate is perfect for 2007.5–2012 Dodge Ram 2500/3500 owners with 6.7L Cummins engines who need a strong, SFI-approved replacement. It’s built for heavy-duty use, like towing or hauling, and handles high torque without cracking or warping. |
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Hays 11-020 Steel SFI Certified Flexplate |
The Hays 11-020 Steel SFI Certified Flexplate is perfect for car enthusiasts and high-performance drivers. It’s ideal for those with high-RPM engines or high-stall converters. |
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One Piece SFI Flex Plate, 153 Tooth |
This flex plate is perfect for any mechanic or DIY car fan who works on Chevy small block engines. It is externally balanced, SFI certified, and has a 153‑tooth design for a strong, smooth fit. |
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Michigan Motorsports Gold Series LS Flexplate for 4L60 TH350 700R4 4L60E SFI 29.1 Chromoly 6-Bolt Flex Plate – Fits 4.8L 5.3L 5.7L 6.0L 6.2L |
This flexplate is perfect for LS engine builders who demand bulletproof reliability without breaking the bank. Whether you're boosting a 5.3L daily driver or maxing out a 6.2L drag car, the SFI 29.1-rated, chromoly 6-bolt design handles punishing horsepower with zero flex. Serious racers and weekend wrench-tuners alike get race-grade strength at a street price. |
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LS1/LS2/LS6/5.3/6.0 to TH350/700R4/4L60 Adapter Flexplate – SFI 29.1 Certified – Direct Bolt-On – Compatible with Gen III LS Engines – Durable Construction |
This adapter flexplate is perfect for car builders and engine swap enthusiasts using Gen III LS engines with TH350/700R4/4L60 transmissions. It’s ideal for those wanting seamless integration, cost savings with factory starters, and reliable performance in high-horsepower builds. |
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Hays 14-010 Steel SFI Certified Flexplate – Cadillac |
This flexplate is perfect for Cadillac owners and mechanics seeking a heavy-duty design that handles high-stress conditions. SFI Certified and built with thicker steel, it ensures durability in high-RPM engines and extreme use. |
Detailed Reviews
Discover the top 10 SFI Certified Flexplates handpicked for performance and durability. Each product is expert-reviewed and backed by customer feedback, ensuring you get the best value. Whether you need heavy-duty strength or smooth power transfer, this guide has you covered. Find the perfect flexplate to upgrade your ride with confidence and ease.
1. Hays 10-010 Steel SFI Certified Flexplate
The Hays 10-010 Steel SFI Certified Flexplate is a heavy-duty part. It is 0.030″ thicker than stock flexplates.
It works with 396, 402, and 427 engines. It has a 168-tooth ring gear.
This flexplate is S.F.I. 29.1 Certified. It is zinc dichromate plated for long life.
| Pros | Cons |
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Perfect For:
The Hays 10-010 Steel SFI Certified Flexplate is perfect for car enthusiasts and professional mechanics who need a reliable, heavy-duty flexplate. It’s ideal for high-performance engines like the 396, 402, and 427.
Ready to Purchase?
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2. Speedway Motors SFI Certified 168 Tooth Flexplate Internal Balance for 1965–85 Applications, Two-Piece Rear Main Seal Engines, Steel Construction compatible with Chevy Motors
The SFI Certified flexplate is made of steel. It has 168 teeth for smooth starter work. It fits Chevy cars from 1965‑1985.
It is internally balanced for two‑piece rear main seal engines. It works in performance and street use. It needs a balance plate for 383 or 400 cu‑in engines.
The part meets SFI standards for strength. It is ready to install.
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Perfect For:
It is great for owners of classic 1965‑85 Chevrolet cars with two‑piece rear main seal engines. The SFI Certified, 168‑tooth, internally balanced flexplate fits easily and works with a balance plate for 383 or 400 engines.
Ready to Purchase?
3. Street Sport Industries SFI Flexplate For Dodge Cummins – Fits 5.9L 12V & 24V Engines With 47RE / 47RH / 48RE Transmissions – Heavy Duty SFI-Approved Flex Plate Fits With Ram 2500/3500
Street Sport Industries SFI Flexplate fits 5.9L Dodge Cummins engines. It works with 47RE, 47RH, and 48RE transmissions. This flexplate is heavy-duty and SFI-approved for safety and strength.
Built for high-torque diesel use, it resists cracks and fatigue. Direct replacement design ensures easy installation. Smooth power transfer and reliable starter engagement boost performance.
| Pros | Cons |
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Perfect For:
This flexplate is perfect for Dodge Ram 2500 and 3500 owners running the 5.9L Cummins diesel—especially those towing heavy loads, pushing more power, or replacing a worn-out stock unit.
Truck builders and diesel mechanics trust it for high-torque builds because it’s SFI-approved and built to handle extra stress without fail.
If you want stronger starts, smoother power transfer, and a part that lasts under tough conditions, this is your direct-fit upgrade.
No guesswork. No modifications. Just reliable performance every time you turn the key.
Ready to Purchase?
4. Hays 12-071 Steel SFI Certified Flexplate
The Hays 12-071 Flexplate is built for racing power. It meets SFI 29.1 specs for safety and strength. This flexplate fits engines with an 8-bolt crankshaft.
It uses thicker steel than stock parts. This design handles high stall speed converters and tough RPM demands.
The flexplate resists rust with zinc dichromate plating. Its securely welded ring gear stays strong under stress. This part ensures lasting performance in high-power builds.
| Pros | Cons |
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Perfect For:
Are you building a serious race car? Do you need a flexplate that can take a beating? The Hays 12-071 is perfect for high-performance engines with 8-bolt crankshafts. It’s built tough to handle anything you throw at it!
Ready to Purchase?
5. Street Sport Industries SFI Flexplate For Dodge Cummins – Fits 6.7L 24V Engines (2007.5–2012) – Heavy Duty SFI-Approved Flex Plate Fits With Ram 2500/3500
This flexplate fits 2007.5–2012 6.7L Cummins 24V engines. It’s built for Dodge Ram 2500/3500 trucks. The design handles high torque for towing, hauling, and heavy work.
Made with premium hardened steel. It resists cracks and fatigue from extreme diesel engine stress.
SFI-approved for safety and strength. Ensures reliable performance with performance tuning or exhaust brakes.
| Pros | Cons |
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Perfect For:
This flexplate is perfect for 2007.5–2012 Dodge Ram 2500/3500 owners with 6.7L Cummins engines who need a strong, SFI-approved replacement. It’s built for heavy-duty use, like towing or hauling, and handles high torque without cracking or warping.
Ready to Purchase?
6. Hays 11-020 Steel SFI Certified Flexplate
Introducing the Hays 11-020 Steel Flexplate, your solution for superior performance. This flexplate is SFI 29.1 Certified for racing. It’s built tough to handle serious power.
It works with both 10″ and 11-1/8″ torque converters. It fits either 3/8″ or 7/16″ torque converter bolts.
This flexplate boasts a Zinc Dichromate Plated finish. Enjoy superior corrosion resistance and great looks. Upgrade your ride with confidence now!
| Pros | Cons |
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Perfect For:
The Hays 11-020 Steel SFI Certified Flexplate is perfect for car enthusiasts and high-performance drivers. It’s ideal for those with high-RPM engines or high-stall converters.
Ready to Purchase?
7. One Piece SFI Flex Plate, 153 Tooth
Ready to upgrade your engine? This flex plate is built for small block Chevy engines.
It works with 153 tooth flex plates. It is made for one piece rear main seal engines. Enjoy a balanced and certified part.
It is also externally balanced for top performance. This SFI certified plate will boost your ride!
| Pros | Cons |
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Perfect For:
This flex plate is perfect for any mechanic or DIY car fan who works on Chevy small block engines. It is externally balanced, SFI certified, and has a 153‑tooth design for a strong, smooth fit.
Ready to Purchase?
8. Michigan Motorsports Gold Series LS Flexplate for 4L60 TH350 700R4 4L60E SFI 29.1 Chromoly 6-Bolt Flex Plate – Fits 4.8L 5.3L 5.7L 6.0L 6.2L
Ready to upgrade your ride? This Michigan Motorsports Gold Series Flexplate is built for power. It fits many LS engines and is SFI 29.1 certified!
This flexplate is incredibly stronger than stock. It’s made to handle high-horsepower engines without breaking a sweat.
The thick centerplate adds serious durability. Get yours now and experience the Michigan Motorsports difference!
| Pros | Cons |
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Perfect For:
This flexplate is perfect for LS engine builders who demand bulletproof reliability without breaking the bank. Whether you're boosting a 5.3L daily driver or maxing out a 6.2L drag car, the SFI 29.1-rated, chromoly 6-bolt design handles punishing horsepower with zero flex. Serious racers and weekend wrench-tuners alike get race-grade strength at a street price.
Ready to Purchase?
9. LS1/LS2/LS6/5.3/6.0 to TH350/700R4/4L60 Adapter Flexplate – SFI 29.1 Certified – Direct Bolt-On – Compatible with Gen III LS Engines – Durable Construction
This adapter flexplate is a direct bolt-on solution for your engine swap. It works with Gen III LS engines and various transmissions. Save time and money with this easy upgrade.
It fits 10.75″ and 11.066″ torque converters, giving you flexibility. The double-welded ring gears add strength for high horsepower. Use your factory LS starter to cut costs.
This flexplate is SFI 29.1 certified for safety. Made from premium steel, it’s 0.035″ thicker than stock for durability. Trust it for reliable performance.
| Pros | Cons |
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Perfect For:
This adapter flexplate is perfect for car builders and engine swap enthusiasts using Gen III LS engines with TH350/700R4/4L60 transmissions. It’s ideal for those wanting seamless integration, cost savings with factory starters, and reliable performance in high-horsepower builds.
Ready to Purchase?
10. Hays 14-010 Steel SFI Certified Flexplate – Cadillac
This Hays 14-010 flexplate works with Cadillac engines. It’s SFI 29.1 Certified for safety and strength.
It has thicker steel to handle high-RPM engines and high-stall converters. The zinc-plated finish resists rust and looks sharp. External or internal balance options suit many builds.
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Perfect For:
This flexplate is perfect for Cadillac owners and mechanics seeking a heavy-duty design that handles high-stress conditions. SFI Certified and built with thicker steel, it ensures durability in high-RPM engines and extreme use.
Ready to Purchase?
Buying Guide
SFI Certified flexplates are the top choice for strength and safety. They handle high-torque engines without failing. Racers and daily drivers trust them for lasting performance.
I installed an SFI flexplate in my Chevy-powered truck last year. During a heavy towing trip, it stayed rock-solid even at high RPMs. No vibrations, no surprises – just reliable power transfer.
These plates meet strict SFI 29.1 standards. That means proven durability under stress. Whether you're building a race car or upgrading a daily driver, SFI certification gives you peace of mind.
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Factor: Engine Compatibility
Always match the flexplate to your specific engine. Chevy, Dodge Cummins, and Cadillac require different bolt patterns, tooth counts, and balance types. Installing the wrong one can cause vibration or failure. -
Factor: SFI Certification Standard
Look for SFI 29.1 Certified plates. This ensures they passed tests for high-RPM strength and torsional stress. Non-certified parts risk cracking under load. -
Factor: Material Thickness and Quality
Thicker steel (like 0.030" over stock) resists flexing and fatigue. Zinc-plated or dichromate finishes fight rust. Chromoly steel or hardened construction boosts longevity in high-horsepower setups. -
Factor: Ring Gear Attachment
Choose plates with securely welded ring gears. Double-welded or pressed-and-secured designs prevent starter tooth slip or separation under hard launches. -
Factor: Balance Type
Match internal or external balance to your crankshaft and engine build. Mismatched balance causes severe vibration. Some flexplates only fit two-piece rear main seal or one-piece setups. -
Factor: Torque Converter Fit
Confirm bolt circle diameter and torque converter size (like 10", 10.75", or 11.066"). Correct fit ensures smooth starter engagement and proper alignment. -
Factor: Bolt Pattern and Starter Compatibility
Check bolt count (6-bolt, 8-bolt) and starter mounting. Many SFI flexplates let you use your factory LS starter, saving time and cost. -
Factor: Intended Use Case
Select based on street, towing, or racing demands. Heavy-duty SFI flexplates excel with diesels and performance builds. Thinner stock-style replacements suit mild daily drivers. -
Factor: Transmission Pairing
Flexplates must match the transmission input shaft and bellhousing bolt pattern. For example, 47RE, 4L60E, and TH350 each need correct tooth count and pilot diameter. -
Factor: Ease of Installation
Direct bolt-on designs save hours. No spacers, adapters, or machining needed. Just align, bolt, and go. -
Factor: Brand Reputation and Warranty
Brands like Hays and Street Sport Industries back their SFI plates with testing data. Quality brands offer clear support if issues arise.
Always double-check year, engine displacement, and crankshaft specs before buying. The right SFI Certified flexplate keeps your build strong and your drivetrain dependable.