Auto Transmiss Parts FRA-112HD Heavy-Duty Automatic Transmission Flexplate 153-Tooth Internal Balance

The FRA-112HD is a heavy-duty automatic transmission flexplate designed as a direct-fit replacement for Chevrolet small block and select big block engine applications using a 2-piece rear main seal. Manufactured from high-strength steel, this flexplate delivers reliable, long-lasting performance in demanding conditions where the standard-duty unit may not suffice.

Key Features:

• 153-tooth ring gear for compatibility with straight bolt-pattern starters on small block Chevy applications
• Heavy-duty steel construction manufactured to meet or exceed OEM specifications for strength and durability
• Internal engine balance — designed for internally balanced engines
• 2-piece rear main seal compatibility for proper fitment on applicable engines
• Dual torque converter bolt patterns to accommodate 10-3/4" and 11-1/2" torque converters, compatible with TH350, TH400, and 700R4 transmissions
• OEM-matched bolt hole spacing punched from OEM blueprints for precise fit
• Non-SFI rated — designed for street and mild performance applications
• Outside diameter: approximately 12.75"–12.875"

The FRA-112HD flexplate connects the engine crankshaft to the torque converter, transferring power while also providing the ring gear teeth that engage the starter motor during engine cranking. Its heavy-duty designation makes it a preferred upgrade over the standard FRA-112 where added durability is needed. Also known as FRA112HD.