TCI 399373 External Balance Flexplate, 168-Tooth, SFI 29.1, Small Block Chevy

The TCI 399373 flexplate is designed for Small Block Chevy applications requiring an externally balanced, 168-tooth flexplate. Manufactured from steel and engineered for dependable performance, it provides a reliable connection between the engine’s crankshaft and torque converter while supporting demanding street, strip, and performance use. This flexplate is intended for engines using a 2-piece rear main seal and is compatible with externally balanced 400 cubic inch GM small block configurations.
The TCI 399373 features an SFI 29.1 certification, making it a suitable choice for vehicles and racing applications where certified flexplate construction is required. Its 168-tooth design is intended for compatible Chevrolet starter and ring gear arrangements. Proper application matching is essential; verify engine balance, rear main seal configuration, starter compatibility, crankshaft bolt pattern, and torque converter fitment before installation.
Built from durable steel, this flexplate is engineered to withstand the rotational forces and operating demands associated with high-performance drivetrain systems. The external balance design helps maintain the correct engine balance when paired with the appropriate externally balanced crankshaft and harmonic damper. TCI part number 399373 is sold individually and provides a focused replacement or upgrade solution for qualifying Small Block Chevy builds.

Features:

• Brand: TCI

• Part Number: 399373

• Tooth Count: 168-tooth ring gear

• Certification: SFI 29.1 certified

• Material: Durable steel construction

• Balance: External balance design

• Rear Main Seal Compatibility: Designed for 2-piece seal applications

• Application: Small Block Chevy and externally balanced 400 cubic inch GM engines

• Quantity: Sold individually