Looking for the best non-SFI flexplates to power your classic Chevy engine?
Discover rugged, precision-engineered flexplates with 168-tooth design, dual bolt patterns, and durable steel construction for smooth, reliable performance in small-block builds.
You’re building a classic Chevy engine. You need reliable power transfer without the hassle of overpriced parts.
Non-SFI flexplates deliver rugged performance for street-driven builds. These flexplates blend 168-tooth precision with dual bolt patterns to fit 1955–1997 small blocks.
Every gearhead knows a flexplate must match starter engagement. These models use premium steel and external balance for smooth shifts. ARP bolts ensure secure installation—no slipping, no headaches.
Upgrading your engine? Two-piece rear main seal fits 400 engines. 1-piece seal versions handle 305s and 350s. 14-inch diameters guarantee factory-like fitment. Trust these flexplates to last for years.
List of Top 3 Non SFI Flexplates
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Speedway Motors 1955-1985 Chevy Flexplate for 2-Piece Rear Main, 168 Tooth – Perfect for Engine/Transmission Installations – Small Block Chevy – Non SFI Rated |
This product is perfect for mechanics or DIY car enthusiasts working on Small Block Chevy engines with a two-piece rear main seal. It offers easy installation, a 168-tooth design for smooth performance, and fits setups with dual bolt patterns and precise dimensions. |
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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 builders needing a two-piece rear main seal setup. Its 168-tooth ring gear ensures smooth starter engagement, and dual bolt patterns (10-3/4″ and 11-1/2″) work with common automatic transmissions for standard street-driven builds. |
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Speedway Motors 168 Tooth Flexplate with ARP Bolts Compatible with 1986-1997 Chevy, 1-Piece Rear Main Seal Small Block Chevy 305 350 Non-SFI Steel Externally Balanced Engine Use |
This product is perfect for Chevy truck or car owners with 1986–1997 305 or 350 engines needing a durable flexplate. It’s ideal for street-driven vehicles or engine rebuilds requiring a direct-fit, steel flexplate with ARP bolts for secure installation. |
Detailed Reviews
Speedway Motors offers three top Non SFI Flexplates built for Chevy engines. Each features 168 teeth for smooth starter engagement, dual bolt patterns (10-3/4” or 11-1/2”), and durability in classic or modern small blocks. Whether upgrading a 1955-1985 two-piece seal engine, a 1986-1997 one-piece seal 305/350, or a 400 with external balance, these flexplates deliver reliable power transfer. With premium steel, ARP bolts, and precise fitment, they’re perfect for street-driven builds or restorations.
1. Speedway Motors 1955-1985 Chevy Flexplate for 2-Piece Rear Main, 168 Tooth – Perfect for Engine/Transmission Installations – Small Block Chevy – Non SFI Rated
Speedway Motors 1955-1985 Chevy Flexplate fits small block Chevy engines with a two-piece rear main seal. It has 168 teeth for smooth transmission performance. The flexplate includes dual bolt patterns (10-3/4” and 11-1/2”) to match different setups.
This flexplate is ideal for engine or transmission upgrades. It measures 14.09” in diameter with a 2-1/2” center hole for precise fitment. Its design ensures reliable power transfer between engine and transmission.
Non-SFI rated, this flexplate works well for standard vehicle builds. It’s a trusted choice for classic Chevy restorations or repairs.
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Perfect For:
This product is perfect for mechanics or DIY car enthusiasts working on Small Block Chevy engines with a two-piece rear main seal. It offers easy installation, a 168-tooth design for smooth performance, and fits setups with dual bolt patterns and precise dimensions.
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 fits Chevy small block 400 engines with a two-piece rear main seal. It has a 168-tooth ring gear and external balance for smooth starter engagement.
Dual bolt patterns (10-3/4″ and 11-1/2″) work with common automatic transmissions. Replace it when installing a new engine or transmission for reliable performance.
This non-SFI flexplate has a 14-1/4″ diameter. Built for street-driven vehicles. Durable and straightforward for daily use.
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Perfect For:
This flexplate is perfect for Chevy small block 400 engine builders needing a two-piece rear main seal setup. Its 168-tooth ring gear ensures smooth starter engagement, and dual bolt patterns (10-3/4″ and 11-1/2″) work with common automatic transmissions for standard street-driven builds.
Ready to Purchase?
3. Speedway Motors 168 Tooth Flexplate with ARP Bolts Compatible with 1986-1997 Chevy, 1-Piece Rear Main Seal Small Block Chevy 305 350 Non-SFI Steel Externally Balanced Engine Use
This Speedway Motors flexplate fits 1986–1997 Chevy small block engines with a 1-piece rear main seal. It works with 305 and 350 externally balanced engines for reliable performance.
The 168-tooth ring gear matches factory starter engagement and drivetrain specs, with a 14.125-inch diameter. It includes an ARP bolt kit for easy installation and improved socket clearance.
Premium steel construction ensures durability. Non-SFI design suits stock or street vehicles. Secure bolts prevent loosening during use.
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Perfect For:
This product is perfect for Chevy truck or car owners with 1986–1997 305 or 350 engines needing a durable flexplate. It’s ideal for street-driven vehicles or engine rebuilds requiring a direct-fit, steel flexplate with ARP bolts for secure installation.
Ready to Purchase?
Buying Guide
Looking for a flexplate that offers reliable power transfer and fits classic Chevy engines? Non-SFI flexplates blend rugged design with precise engineering for smooth, street-driven performance.
- Tooth Count: 168 teeth ensure smooth starter engagement and match factory specs. This count delivers consistent power transfer without skipping or wear.
- Bolt Patterns: Dual bolt patterns (10-3/4” and 11-1/2”) fit multiple transmissions. This versatility simplifies upgrades or swaps for small block Chevy engines.
- Material Quality: Built with premium steel and ARP bolts for durability. These materials resist stretching or loosening under heavy use.
- External Balance: Ensures smooth shifts and aligns with factory starter systems. Critical for engines like the 305, 350, and 400.
- Rear Main Seal Fit: Two-piece seals suit 400 engines; 1-piece works for 305/350. Correct seals prevent leaks and ensure proper installation.
- SFI Rating: Non-SFI rated for street-driven vehicles. Avoids overkill for daily use while maintaining reliability.
- Diameter & Fitment: 14-inch diameters mimic factory fitment. Precision engineering ensures no wobble or misalignment during operation.