Flexplate TF727 (383-440)

The B and M AUTOMOTIVE Flexplate TF727 (383-440) is a premium SFI 29.1-certified flexplate engineered for high-performance Mopar B and RB-Series engines, including the legendary 426 Hemi. This steel flexplate features a 6-bolt crank interface and external balance design, making it the OEM-equivalent choice for engine builders and restoration specialists working with classic and modern Mopar powerplants requiring reliable torque multiplication and vibration isolation.

The external balance configuration ensures compatibility with externally balanced Torqueflite 727 automatic transmissions paired to B and RB-Series blocks. SFI 29.1 certification guarantees compliance with racing and high-performance standards, confirming the flexplate can safely handle sustained high-RPM operation and shock loading typical of modified engines. At 3.56 lbs, this flexplate delivers the mass and structural rigidity necessary to absorb drivetrain harmonics without deflection, critical for preserving transmission longevity during hard acceleration and engine braking events.

This flexplate is purpose-built for engine swaps, restorations, and performance builds targeting Mopar muscle cars, trucks, and industrial applications where the 383, 400, 426 Hemi, and 440 big-block engines dominate. Whether building a period-correct A-body, B-body, or C-body restoration or upgrading a classic truck with a proven Mopar V8, the Flexplate TF727 provides the engineered durability and balance characteristics required for dependable power transfer. Installation with the OEM-style 6-bolt crank flange ensures straightforward fitment without modification.