A727 Flexplate (340 Ci.)

The A727 Flexplate (340 Ci.) from B and M AUTOMOTIVE is a purpose-built transmission flexplate engineered for Mopar 340 cubic-inch engines paired with Torqueflite 727 automatic transmissions. This component serves as the critical mechanical bridge between engine crankshaft and torque converter, absorbing shock loads and transmitting rotational force with precision engineering that separates factory-quality rebuilds from substandard aftermarket alternatives. Whether you're restoring a classic Mopar muscle car, rebuilding a powertrain after high-mileage service, or upgrading an existing 340 installation, the A727 flexplate delivers the reliability that professionals and enthusiasts demand.

Constructed from steel with SFI 29.1 certification—a critical safety rating for dynamic rotating components—this flexplate is machined to external balance specifications and features a six-bolt crank interface that matches Mopar's original engineering tolerances. The external balance design ensures compatibility with balanced crankshafts and vibration dampers, preventing harmonic imbalances that can accelerate bearing wear and transmission failure. At 4.02 pounds with compact dimensions (14.4 x 0.95 x 14.5 inches), the A727 meets OEM fitment standards for 1960s–early 1970s Chrysler applications, with precisely-drilled bolt holes and ring gear engagement surfaces rated for both street and moderate performance driving.

Technicians performing Torqueflite 727 transmission rebuilds or complete powertrain restorations will find the A727 flexplate essential for maintaining factory fitment and durability in 340-powered Mopar vehicles. This component is non-negotiable if your engine block is externally balanced; improper flexplate selection causes vibration, torque converter runout, and accelerated transmission failure. Installation requires engine removal in most applications and should be torqued to manufacturer specifications during reassembly. For buyers seeking genuine B and M AUTOMOTIVE quality backed by SFI certification, the A727 represents the correct choice for any serious 340 Ci. build or restoration project.