Pro Series Flexplate SFI 91-97 BBC 454-502

The Pro Series Flexplate SFI 91-97 BBC 454-502 is a precision-engineered flexplate designed for big-block Chevrolet engines running 454 or 502 cubic-inch displacement in model years 1991 through 1997. Built for serious engine builders and performance enthusiasts, this component bridges your engine's crankshaft to your transmission, absorbing rotational harmonics while safely transferring power to the driveline. Whether you're building a street engine, restomod, or competition platform, a quality flexplate is non-negotiable for smooth operation and reliability.

Manufactured by PRW Industries, a trusted name in rotating assembly components, this Pro Series flexplate features SFI 91 certification—the industry standard for impact resistance and safety in high-output applications. The design incorporates damping characteristics that minimize vibration and stress on transmission input shafts, converter hubs, and engine crankshaft bearings. At 7.78 lbs with a 14.5-inch diameter, the flexplate's mass and balance are optimized for the power band of large-displacement BBC engines, ensuring repeatable torque transfer without harmonic-induced failure. The rigid yet slightly compliant construction handles both street-driven reliability and sustained performance driving.

This flexplate is essential for any 1991–1997 BBC 454 or 502 owner upgrading internals, swapping transmissions, or refreshing the rotating assembly after high-mileage service. Installation requires engine removal and transmission separation—a job best handled in a full engine-out situation. Verify your exact model year, displacement, and transmission type before ordering, as flexplate fitment is engine and converter-specific. Pair this with quality engine seals, a rebalanced converter, and properly torqued fasteners for a bulletproof drivetrain that will handle your engine's full potential.