1845400 Flexplate 168 Teeth Bolts for Chevy 70 90 Big Block 454 Chromoly Steel

This Flexplate is a chromoly steel flexplate with 168 teeth compatible with 1970-1990 Big Block Chevy 454 engines and matches OEM Part# 1845400. Includes mounting bolts.

Product Overview

This heavy-duty flexplate connects the crankshaft to the torque converter in automatic 454 Big Block builds. With 168 teeth and chromoly steel construction, the flexplate withstands high torque loads without warping or cracking. Ideal for street performance, towing, and racing applications that demand a reliable flexplate.

Key Features & Performance

• Chromoly steel construction delivers high tensile strength and crack resistance
• 168-tooth ring gear for proper starter alignment and consistent cranking
• Double-welded ring gear withstands repeated torque spikes
• Mounting bolts included for a complete, ready-to-install package
• Precision-machined center pilot ensures perfect crankshaft alignment

Fitment & Compatibility

• 1970–1990 Big Block Chevy 454 V8
• Designed for automatic transmissions

Common Uses

• Engine overhauls and performance builds for classic Chevy trucks, Chevelles, and Corvettes
• Replacing cracked or fatigued factory flexplates on high-mileage 454s
• Drag racing and street/strip builds demanding a durable flexplate
• Heavy-duty towing applications where driveline shock loads are frequent

Technical Specifications

• Part Number(s): 1845400
• Tooth Count: 168
• Material: Chromoly Steel
• Includes Bolts: Yes

Frequently Asked Questions

Q: Is this flexplate compatible with both internally and externally balanced 454 engines? A: This flexplate is intended for externally balanced 454 engines; confirm your engine balance factor before ordering.

Q: Do I need a specific starter to match the 168-tooth ring gear? A: Yes, a starter with an offset bolt pattern designed for 168-tooth flexplates is required; always verify starter compatibility.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.