1845400 Flexplate 168 Teeth w/Bolts For 70-90 Big Block Chevy 454 Chromoly Steel
1845400 Flexplate 168 Teeth w/Bolts For 70-90 Big Block Chevy 454 Chromoly Steel
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Flexplate for Chevy
1845400 flexplate with 168 teeth and bolts for 1970-1990 Chevrolet Big Block 454 engines, engineered from chromoly steel for reliable torque transfer and precise starter engagement.
Overview
This flexplate connects the crankshaft to the torque converter in automatic-transmission Chevrolet Big Block 454 engines from 1970 to 1990. The chromoly steel construction withstands high horsepower and torque loads, making this flexplate a trusted choice for street performance, restoration, and heavy-duty use. Each flexplate includes the necessary bolts for installation.
Built For Performance
- 168-tooth ring gear for reliable starter drive
- Chromoly steel construction resists cracking and warping
- Precision balanced for smooth engine operation
- Includes bolts for a complete, ready-to-install kit
- Engineered for automatic transmission applications in 1970–1990 Big Block Chevy engines
- Thick center plate reinforces the crank flange area
Fits These Machines
- for Chevrolet Big Block 454 (1970–1990)
On-The-Job Use
- Installing a high-performance automatic transmission behind a rebuilt 454 engine
- Replacing a cracked or worn flexplate in classic Chevy muscle cars and trucks
- Upgrading drivetrain components for drag racing, street performance, or towing
- Completing an engine swap or restoration project on a 1970–1990 Chevrolet platform
- Pairing with aftermarket torque converters for increased stall speed
Specs At A Glance
| Part Number(s) | 1845400 |
| Tooth Count | 168 |
| Material | Chromoly Steel |
| Includes | Bolts |
| Engine | Chevrolet Big Block 454 (1970–1990) |
Good To Know
Q: Will this flexplate fit a 1990 Chevrolet 454 truck with a 4L80E transmission? A: This flexplate is designed for 1970–1990 Big Block Chevy 454 engines and includes a bolt pattern compatible with TH350, TH400, 700R4, and many 4L80E torque converters; verify converter bolt circle before ordering.
Q: Is balancing required after installing this chromoly flexplate? A: The flexplate is precision balanced from the factory for typical 454 external balance; however, for high-RPM or stroker builds, have your rotating assembly checked.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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