BBC Billet Flex Plate 139 Tooth 10-Pitch SFI

The BBC Billet Flex Plate 139 Tooth 10-Pitch SFI from MEZIERE is designed for serious big-block Chevy builds, ensuring reliability and durability in high-performance applications. Flex plates serve as a critical connection between the engine and transmission, effectively absorbing harmonic vibrations while transmitting torque from the crankshaft to the converter.

This product features a billet aluminum construction that offers strength and precision, making it a preferred choice for builders looking to minimize the risk of cracking under extreme loads. The 139-tooth, 10-pitch design is standard for BBC engines, ensuring compatibility with most modern and vintage automatic transmissions for proper converter engagement and starter motor indexing.

Builders and mechanics working on BBC engines with high horsepower, forced induction, or solid-roller cams will find this flex plate essential for maintaining driveline integrity. Its lightweight yet rigid design helps reduce parasitic losses while ensuring optimal runout tolerance, which is crucial for balanced driveline geometry and converter efficiency.